T. D. A. COCKKRELL. 161 



ments almost covered with appressed white puhescence, fifth with long, depressed, 

 white haii's ; extreme apex with some fuscous hairs; pygidium transversely lineo- 

 late; ventral segments with thin fringes of oblique pale hairs, v^'hich carry very 

 little pollen. 



% . — Length about 7 mm., wholly shining black, except the flagellum rufescent 

 beneath, the claw-joints of tarsi rufous, the mandibles medially dark rufous ; and 

 the very broad low clypeus and the labrum wholly pale primrose yellow; dorsum 

 of thorax somewhat more hairy than in the f > 'Jut the abdomen above entirely 

 nude, except a short lateral white hair band on segment 5, and a complete band 

 on segment 6; segments 3-5 conspicuously punctured, second with very minute, 

 sparse punctures; the hind legs have quite long white hairs, which entangle a 

 small quantity of pollen. 



Hab. — Oil flowers of Sida hederacea, IVtesilla, New Mex., July 

 21, 1896, ten females, one male. A very distinct species, known by 

 the black male, and female with red abdomen. 



(27.) Exoinalopsis penelope n. sp. f.— Length 7 mm. Black, shining, 

 sparsely pubescent; vertex shining, impunctate ; ocelli in a very slight curve; 

 front with suberect grayish white hairs; face with appressed, plumose, white 

 pubescence, conspicuously denser at sides ; clypeus with large, not very close 

 punctures, and minute ones in between; mandibles rufous, except at base, short 

 and blunt, simple; cheeks with thin, dull white pubescence; flagellum, except 

 the first .joint, brown beneath ; mesothoras strongly punctured, its anterior half 

 with inconspicuous brownish gray pubescence, its hind half bare : hind margin 

 of prothorax and tubercles with rather dense, dull white pubescence; a band on 

 hindmost half of scutellum, and an oval patch on postscutellum of light orange 

 rufous pubescence, very conspicuous ; sides of metathorax and pleura with dull 

 white pubescence, finely plumose; tegulae piceous. Wings hyaline, nervures and 

 stigma ferruginous, costal nervure black; first recurrent nervure joining the 

 second transversocubitHl ; second recurrent joining third submarginal cell at its 

 end. Legs black, with dull white pubescence, small joints of tarsi rufous: basal 

 joints of tarsi within with orange rufous pubescence, the brush of hind tarsi 

 being of the same color; scopa of hind legs wholly pale, copious, yellowish, or 

 light rufons, its color hard to see because it is filled with orange pollen. Abdo- 

 men short and broad, first segment excessively shiny, impunctate, base of second 

 with fine, close punctures; base and sides of first segment with thin gray pubes- 

 cence, second segment with a very broad V of white pubescence on each side ; 

 third and fourth apparently fasciate, but the hair-bands visible only at the side, 

 otherwise covered by the retraction of the segments; fifth covei'ed with white 

 hairs; venter rather thinly pubescent. 



%. — Smaller, with the abdomen narrower and more tapering; face covered 

 with white pubescence; flagellum entirely rufous beneath, first joint about half 

 as long as second ; mesothorax more sparsely punctured ; tegulse clear rufous. 

 Wings slightly dusky at apex; scutellum and postscutellum with the orange 

 rufous pubescence not always obvious, but sometimes so, and the pubescence of 

 the anterior part of the mesothorax also dark orange rufous ; all the tarsi rufous, 

 middle tibia with a rufous spot at end ; basal joint of hind tarsus with long, con- 

 spicuously plumose, fulvous pubescence, which also intrudes somewhat on to the 

 tibia; the outer side of the basal joint is minutely speckled with black. Abdo- 



TRANS. AM. ENT. SOC. XXIV. (21) JUNE, 1897. 



