Species Account taken from "A Revision of the Genus Neolarra (Hymenoptera: Nomadidae)
Author(s): Charles D. Michener Source: Transactions of the American Entomological Society (1890-), Vol. 65, No. 4 (Dec., 1939),pp. 347-362"
Neolarra alba Cockerell, Ann. Mag. Nat. Hist., (8), xvn, p. 285, 1916. Neolarra pruinosa Cockerell (misidentification), Pan-Pac. Ent., v, p. 104,1929, [Riverside record].
This is a robust, densely white pubescent species in which the
abdomen is red in the female and black in the male. The female
differs from all of the smaller species except californica by the
deep notch of the fifth tergite. The male differs from both
pruinosa and californica by the broad process of the seventh
tergite.
Male. Head: Eyes where closest together separated by about the length of one of them ; distance from median ocellus to posterior margin of vertex about half distance from median ocellus to antennal bases; first segment of flagellum broader than long and shorter than pedicel; flagellum test aceous, darker above; labrum black; mandibles dark testaceous, reddish apically. Thorax: Width across pronotal tubercles slightly less than width across mesepisterna; tegulae brownish; process of metanotum rather small
and short ; axillae as in figure 3 ; bases of tibiae testaceous, apices of middle and hind tibiae more or less brownish; two recurrent and two transverse cubital veins present, second submarginal cell very short. Abdomen: Black,
densely covered with white pubescence, only a little less dense on bases of tergites than on apices; process of seventh tergite testaceous, broad,tapering throughout, slightly blunt at apex (similar to figure 10). Length,3.5 mm.
Female. Similar to male; eyes a little closer together; labrum more or less testaceous; tarsi and fore tibiae largely testaceous; abdomen red, so densely covered with white pubescence that it appears hardly pinkish in some individuals; fifth tergite with deep, median, posterior notch. Length 4 mm.
Type.Male; Claremont, California; [T. D. A. Cockerell Collection].
Range.Southern California west of the mountains
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