Species account taken from: "A Revision of the Genus Ashmeadiella (Hymen., Megachilidae) Author(s): Charles D. Michener Source: American Midland Naturalist,Vol. 22, No. 1 (Jul., 1939), pp. 1-84"
This is a large, black, rather sparsely pubescent species, having the aspect of a moderate sized specimen of bucconis denticulata. It differs from other species of Titusella by the punctured clypeus, the anterior margin of which is broadly and shallowly concave.
Female: Transfacial line longer than facial; inner margins of eyes slightly converging below except for lower parts where they diverge; sides of faces densely covered with white hair; clypeus closely punctate laterally, coarsely and sparsely punctate medially; anterior margin of clypeus with broad, shallow, smooth matgined concavity, the ends of which are marked by distinct, some- what produced angles; arising beneath anterior margin of clypeus are two orange brushes, occupying the entire width of emargination; labrum bilobed at apex, most of its surface very sparsely punctate, shiny, finely lineolate; mandible with orange hairs just basad to teeth on outer sides; distance from first mandibular tooth to inner apical angle greater than distance from inner apical angle to base of mandible; mandibles with long apical tooth and dis- tinct subapical tooth; remaining teeth inconspicuous, rounded elevations on a long, essentially straight matgin, which is at an acute angle with the apical part of the inner margin of the mandible; cheeks nearly as broad as eyes seen from side; anterior ocellus somewhat posterior to midpoint between antennal bases and posterior edge of vertex; distance between posterior ocelli less than distance to posterior edge of vertex; vertex rather finely and closely punctured. Scutum without pair of spots of hair anteriorly, punctured like more coarsely punctate parts of vertex; scutellum more sparsely punctate than scutum; mesepisterna slightly more sparsely punctate than scutum; wings grayish; inner margin of inner hind tibial spurs finely serrate with about seventeen small teeth, outer margin with about eight larger teeth; outer spurs with about eight or nine teeth on each margin, those of inner matgin larger and slightly fewer than those of outer. Abdominal tergites one to three finely and sparsely punc- tate dorsally, except for posterior margins which are closely punctate; tergites four to six, and tergites one to three laterally, closely punctate; tergites one to four with distinct, apical bands of white pubescence; scopa dull white. Length 6? mm.
Holotype and one paratype: Apache Camp, Santa Catalina Mountains, Arizona, 5500 feet elevation, July 25, 1917 (J. Bequaert collection, Museum of Comparative Zoology, Cambridge, Massachusetts