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Reprinted with permission from: Daly, H. V. 1973. Bees of the genus Ceratina in America North of Mexico (Hymenoptera: Apoidea). University of California Publications in Entomology 74: 1-114. The Regents of the University of California. Published by the University of California Press.
Ceratina texana Daly, new species
Allotype female—Measurements and ratios: wing, 3.8 mm; hamuli, 5; eye, 100:115:105:90; clypeus, 50 × 87:26:75; interocellar, 25:40:25:40, Ø 12.0; frontal carina, 60; malar area, 0 × 45; interalveolar, 26:22:40:45, Ø 14; antenna, 45:12:7:6:6:7, Ø 15; subpleural signum, 12 × 2.5.
Structure: Head rounded in cephalic view; eyes convergent below, narrowly rounded above, subtruncate at malar area; frontal carina simple, distinct between alveolae, sulciform beneath median ocellus; circumantennal area shallowly depressed; alveolocellar area gently convex; vertex and supraorbital area limited posteriorly by preoccipital ridge without carina; gena unmodified; median portion of hypostomal carina when viewed laterally of low uniform height, terminating anteriorly without a tooth, when viewed ventrally angle between median and lateral portions about 1200. Pronotum with transverse carina basal in position and distinct only medially; dorsolateral angle rounded, not carinate; lateral carina distinct but terminated beneath dorsolateral angle; pronotal pit sulciform; scutum with caudal end of admedian line and cephalic end of parapsidal line overlapping on imaginary transverse line; notauli poorly defined caudad; metapleural line carinate; lateral procoxal angle narrowly rounded; protibia and mesotibia with simple, single apical spines; basitibial plate spiniform, its slightly elevated apex at basal 0.28 of tibial length. Metasoma widest at segment 4; terga 2-5 constricted at distinct graduli, less constricted subapically; gradulus of tergum 4 terminating laterally beyond and below spiracle at a distance of 2.0 spiracle lengths; tergum 6 evenly declivous, without notched lateral profile; gradulus of sternum 2 arcuate, gradulus of sternum 3 slightly arcuate; wax glands half-moon shaped.
Sculpture and vestiture: Read shiny between punctures, largely impunctate on clypeal disc., lowest paraocular area, subantennal area, convex portion of alveolocellar area and in narrow band behind eye; sparsely punctured on mandible base and gena; elsewhere with fine to medium punctures less than a puncture width apart and with largely simple setae; punctures closer in interalveolar, supraorbital, and paraocular areas and vertex; very sparse setae longer in inter- alveolar and postgenal areas, vertex, labral disc and apically on mandible. Sides of pronotum finely and contiguously punctured, impunctate area above pronotal pit; scutal disc polished, virtually impunctate except moderately along lines, fine punctures marginally less than a puncture width apart laterally and on axilla; scutellar disc moderately punctate, fine punctures becoming closer and almost contiguous laterally and posteriorly; metanotum finely and contiguously punctured throughout; mesopleuron with medium punctures less than a puncture width apart laterally, becoming more widely spaced posteroventrally, setae narrowly plumose, becoming longer posteroventrally; hypoepimeral area impunctate just above scrobe; metapleuron finely punctured, less titan a puncture width apart; minute impunctate area before metapleural pit; propodeal triangle reticulate rugulose, longitudinal carinulae distinct only mediad; angle of propodeum impunctate, minutely coriaceous; sides finely punctured, becoming closer and smaller laterad, with erect, narrowly plumose setae. Loose scopa of mostly three-branched setae on outer surface of tibia. Metasomal tergum 1 finely punctured on dorsal surface about a puncture width apart, virtually impunctate on anterior surface; terga 2-5 with scattered fine punctures on pregradular area near gradulus, postgradular punctures fine, uniformly about a puncture width apart, each with a short appressed simple seta; ground polished, but subapically minutely roughened on tergum 4; tergum 5 finely papillate; tergum 6 finely punctured about a puncture width apart, ground finely papillate throughout, central area obscure, setae short, simple. Sterna finely punctured, 1—3 puncture widths apart; setae simple, fine, suberect, dense at apex of abdomen; setae of wax glands appressed.
Color: Head and thorax metallic very dark greenish-blue (ISCC-NB8 175) with minor yellowish reflections; abdomen metallic olive green (No. 125) reflections over fuscous cuticle; metallic colors lacking on labrum, mandibles, mesoscutal disc, and wax glands. Ivory marks: broad almost bell-shaped on clypeus, extending almost full length and abruptly expanded near apex of clypeus; spots at apex of profemur, stripe extending to length of protibia, spots at bases other tibiae, being largest on metatibia; pronotal lobes. Antennae fuscous, lighter beneath; legs proximally light fuscous, femora and tibiae faintly metallic, tarsi apically testaceous; wing membrane hyaline, venation testaceous, tegula light testaceous. Body setae pale flavescent.
Holotype male—Measurements and ratios: wing, 3.9 nun; hamuli, 5; eye, 110:115:95:85; clypeus, 55 × 85:27:75; interocellar, 25:35:20:40, Ø 17.0; frontal carina, 60; malar area, 0 × 40; interalveolar, 30:20:40:45, Ø 16; antenna, 35:10:12:8:8:10, Ø 15; subpleural signum, 12.5 × 2.5.
Structure: Head rounded in cephalic view; eyes moderately convergent below, rounded above, broadly rounded at malar area; frontal carina simple, distinct between alveolae, sulciform beneath median ocellus; circumantennal area shallowly depressed; alveolocellar area gently convex; vertex and supraorbital area limited posteriorly by preoccipital ridge without a carina; median portion of hypostomal carina when viewed laterally of low uniform height, terminating anteriorly without a tooth, when viewed ventrally lateral portion arcuate. Pronotum with transverse carina basal in position and distinct only medially; dorsolateral angle rounded, not carinate; lateral carina distinct but terminated beneath dorsolateral angle; pronotal pit circular; scutum with caudal end of admedian line and cephalic end of parapsidal line overlapping on imaginary transverse line; notauli poorly defined caudad; metapleural line carinate; lateral procoxal angle narrowly rounded; protibia and mesotibia with simple, single dorsoapical spines; ventral profile of metatrochanter right-angled; width of metafemur at tooth 0.56 length, tooth pointed, obtusely 105° angled, basal ventral facet narrow, distinct, polished concave surface, ventral edge bare (resembles fig. 9c). Metasoma widest at segment 3; terga 2-5 constricted at distinct graduli, less constricted caudad; gradulus of tergum 4 terminating laterally beyond and below spiracle at a distance of 2.5 spiracle lengths; tergum 6 with slight median subapical protuberance surmounted by setae; dorsal view of apical plate width 3.3 times length, conspicuous, broadly rounded; sternum 6 with one median tooth divided at apex (resembles fig. 131). Genitalia presumed to be similar to fig. 281.
Sculpture and vestiture: Head shiny between punctures, largely impunctate on clypeal disc, subantennal area, lower convex portion of alveolocellar area and in narrow band behind eye; moderately punctured on mandible base with minute and fine punctures; gena with fine to medium punctures about a puncture width apart; elsewhere with fine to medium punctures less than a puncture width apart and with largely simple setae; punctures closer in interalveolar area; sparse setae longer in interalveolar and postgenal areas, vertex, and posteriorly on mandible. Sides of pronotum finely and contiguously punctured, impunctate area above pronotal pit extending to beneath dorsolateral angle; scutal disc shiny, impunctate areas restricted, moderately punctured along lines, fine punctures marginally and contiguous laterally and on axilla; scutellar disc moderately punctate, fine punctures becoming contiguous laterally and posteriorly; metanotum finely and contiguously punctured throughout; mesopleuron with medium punctures almost contiguous laterally, becoming more widely spaced posteroventrally, long plumose setae; hypoepimeral area impunctate in lower half; metapleuron finely punctured, less than a puncture width apart; small impunctate area before metapleural pit; propodeal triangle reticulate rugulose, longitudinal carinulae distinct even laterally; angle of propodeum impunctate, minutely coriaceous; sides finely punctured, becoming contiguous and smaller laterad, with erect, plumose setae. Metasomal tergum 1 finely punctured on dorsal surface less than a puncture width apart, virtually impunctate on anterior surf ace; terga 2-6 with scattered fine punctures on pregradular area Rear gradulus, postgradular punctures flue and uniformly less than a puncture width apart, each with a short appressed simple seta; ground shiny, but minutely roughened on terga 4—6; tergum 7 finely punctured about a puncture width apart with roughened ground, apical plate above with long, laterally spreading, plumose hairs extending beyond plate. Sterna 1—5 finely punctured, less than a puncture width apart; setae fine, suberect, narrowly plumose, longer subapically on each sternum.
Color: Head and thorax metallic light olive (ISCC-NES 106) with minor yellowish or brassy reflections; abdomen darker blue-green and cuticle beneath metallic reflections dark fuscous; metallic colors lacking on mandibles which are dark fusco-rufous. Ivory marks: broad hat-shaped on clypeus, extending full length and width; irregular subrectangular spot on labral disc; spots at apex of profemur, stripe extending 0.6 length of protibia, spots at bases of other tibiae, being largest on metatibia; pronotal lobes. Antennae fuscous, lighter beneath; legs proximally fuscous, femora and tibiae faintly metallic, tarsi apically testaceous; wing membrane light testaceous, venation testaceous; tegulae light testaceous. Body setae pale flavescent.
Holotype compared with illustrations of other conspeeific specimens: metafemur and metatrochanter (fig. 9c), sternum 6 and apical plate (fig. 131); genitalia not dissected from holotype, but illustrated from another specimen (fig. 28i).
Type specimens—Holotype male, Southmost, Cameron County, Texas, 111-27-1951, C. D. Michener; allotype female, same place and date as holotype, L. B. Beamer. Paratypes, same place and date as holotype, 25 females and 19 males on Agastache breviflora, Monarda citriodora, and Rubus sp., L. B. and R. H. Reamer, and C. B. Michener.
Holotype and allotype deposited at the University of Kansas. Paratypes at the California
Academy of Sciences, American Museum of Natural History, and U. S. National Museum.
The males of Ceratina texana are distinguished from C. strenu4 by the bare, sharply toothed metafemur and sixth sternum with a single median tooth which is divided only at the apex. C. strenua from Kerr-vile and Fedor, Texas, exhibit the typical pubescent metafemur with the slight convexity beyond the apex of the tooth and two median teeth on the sixth sternum. The legs of smaller specimens of C. strenua from Texas may be nonmetallic and often paler than C. texana. The females of C. texana are differentiated from C. strenua by the broader, more bell- shaped clypeal mark and paler, almost nonmetallic legs. The distribution is illustrated in fig. 26.
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