Monographie der Bienengattungen Exomalopsis, Ptilothrix, Melitoma und Tetrapedia. 257 



forward behind the ocelli. Front with copious white hairs, seeming to radiate from the 

 antennal sockets; clypeus and labrum with rather thin yellowish pubescence. Antennae 

 black, the last half of the flagellum becoming rufous; 2'"-^ Joint of flagellum equal with 

 3'''^, or, if anything, rather shorter. Mandibles black; 4"' and 5^'^ joints of maxiilary palpi 

 of equal length, 6^'' shorter. In another specimen the 4^'^ Joint is clearly longer than 

 the 5^'\ Glossa reddish, the tip obtuse. 



»Thorax with rather dense pubescence, except the scutellum, hind half of meso- 

 thorax, and dorsum of metathorax, which are bare. The dorsal pubescence is dull 

 yellowish-gray, with even a few black hairs immediately behind the scutellum and at 

 the sides of the mesothorax; on the hind border of prothorax is some dense short pale 

 pubescence, showing through the longer hairs. At the sides of the metathorax and on 

 the pleura the pubescence is whitish. The exposed portions öf the meso- and meta- 

 thorax are practically impunctate, but the pleura is very strongly punctured. Tegulae 

 large, piceous. Wings smoky-hyaline (i 9 schwarz), stigma and nervures piceous; 

 marginal cell long, pointed; 2""^ submarginal not half as big as the i^* or 3'"'^, a little 

 narrowed above; 3'"'^ submarginal narrowed nearly one-half to marginal. Femora and 

 tibiae black; tarsi rufescent. Pubescence of legs whitish, that of tarsi reddish behind. 

 Tibio-tarsal brush of hind legs very large, the hairs very distinctly plumose, whitish 

 or dull silky white, not at all gray or black, but rufescent on*tarsi beneath. 

 Claws very strongly bifid. 



»Abdomen short, nearly subglobose; bases of segments with sparse silky pubes- 

 cence; hind margins of segments 2 — 4 and sides of hind margin of i*' segment with 

 narrow even bands of pure white pubescence, very conspicuous. 



»First found at Albuquerque, N. M., not uncommon on flovvers of Solanum 

 elaeagnifoliiim between the old and new towns, Aug. 16, 1895. On Oct. i3 I took one 

 at Las Cruces, N. M., on a plant supposed to be Flaveria. Specimens were also taken 

 at Las Cruces by Mr. C. Rhodes, on Verbesina encelioides and Bigelovia Wriglitii, 

 early in October. 



»Curiously, this insect seems to resemble the West Indian types rather than the 

 Mexican. I sent one to Mr. Fox, who remarks that it ,differs from any in our collection 

 by the narrow, continous, white fasciae of abdomen, which are more regulär than in 

 the related species. From pulchella and similis it differs by the apparently unicolorous 

 pubescence of hind tibiae, and again from similis by the dorsulum being polished and 

 impunctate medially'. The Mexican species nearly all have black pubescence.« 



Exomalopsis solani ähnelt der limata, hat aber greise Thorax- und Abdomen- 

 behaarung, sowie weissliche Scopa. Ich verdanke dem Autor i 9 von Mesilla, 19. Juli, 

 N. -Mexico; es wurde an Sphaeralcea angustifolia gefangen. 



12. Exomalopsis eriocarpi Cockll. i. 1. 



1898. Exomalopsis eriocarpi Cockerell, 9, i. 1. d. d. 21. IX. 1898. 



»9. Length 9 mm., black; quite densely clothed with short pale ochreous hair, 

 white on pleura, metathorax, face, cheeks and femora; head considerably broader than 

 long; face ihickly clothed with white hair, but the lower half of clypeus nude, 

 strongly and confluently punctured, with a broad yellow transverse band 

 just above the rufescent anterior margin; labrum yellow; mandibles with a large 

 yellow patch, suffused with rufous at base; ocelli large; sides of vertex punctured; 

 scape black; flagellum blackish above, ferruginous beneath except the first 



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