116 



repeated by lirauer and Berjieiistaiiiin.' Two species occur in our 

 fauua, aud in each there are three postsiitural and two or three steruo- 

 pleural niacrochii'ta^ : 

 Tibia' aud antenujie, except sometimes apex of second joint, black; 

 . / J ai)ical cell closed, frontal bristles descending beneath base of 



'^^''''^TT''*'^ J second antenna! joint; len<ith, to 7 mm. Beverly, Mass. ; Tif 

 ton, Ga. ; Georgetown, Fla.; Mobile, Ala. ; Agricultural College, 

 INIiss. ; St. Louis, Mo., and Los Angeles County, Cal. (Proc. 

 Acad. ISTat. Sci. Philadelphia, }). oil ; Sept., 1895.) . . (letUata Coq. 

 Tibia', and second auteunal joint yellow, apical cell^\opei?,'froutal 

 bristles not descending to base of second antennal joint; black, 

 the palpi, apex of proboscis, iirst two joints of antenna', tro- 

 chanters, apices of femora, and whole of tibia' yellow; front of 

 female as broad as either eye, the sides brownish gray pollinose, 

 two pairs of orbital bristles, face M^hite pollinose; antenna' 

 reaching slightly below middle of face, the third joint one and 

 one-half times as long as the second, arista thickened on the 

 basal fourth, vibrissa' inserted three-fourths the length of the 

 third antennal joint above the oral margin, two or three bristles 

 above each, cheeks oue-lifth as broad as the eye height; thorax 

 gray pollinose, marked with four black vittiie; abdomen gray 

 pollinose, a black dot at base of each hair, the hairs depressed, 

 a marginal pair of macrochnetie on the second segment and a 

 marginal row on the third and fourth; wings hyaline, third vein 

 bearing one or two bristles near the base, the others bare, apical 

 crossvein nearly straight, bend of fourth vein forming an obtuse 

 angle; calypterc^ whitish; length, -4 mm. Santa Cruz Moun- 

 tains, California. /( 14. single female specimen, collected by A. 

 Koebele. Type No. 3C20, U. S. National Museum, .tibialis u. sp. 



Genus PSEUDOCH^TA Coq. ^ 



Pseiidochwta CoqniUett, Proc. Aciid. Nat. Sci. rbiladelpliiii, j). 309; Sept., 1895. 



Our species have tW^o or three pairs of backwardly curving macro- 

 chwtic on the sides of the front ill both sexes, and with two pairs of 

 forwardly directed orbital bristles in the female, wanting in the male; 

 four postsutural macrocha'tte : 



With only two steruopleural macrochretje ; blackj'Tnncluding the 

 palpi; third joint of antenna', in the male five, in the female 

 three, times as long as the second; length, ~> to 7 mm. From the 

 type specimen. Northern Illinois; Tifton, Ga. ; Charlotte Har- 

 bor, Florida, and Santa Barbara County, Cal. (Proc. Acad. Nat. 



Sci. Phila., p. 310; Sept., 1895.) argenti/rons Coq. 



With four sternopleural macrocha^taj ; black, the apex of scutellum, 

 sides of second segment of abdomen, hind corners of the first and 

 front corners of the third, yellow ; front of female scarcely as wide 

 as either eye, the sides aud face silvery pollinose, frontal vitta 



' Zweif. (les Kais. Museum zu Wieu, VI, p. 226; 1893. 



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