110 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 97 
KEY TO THE SPECIES OF GENEA 
1. Third abdominal segment with a transverse black band, which occupies at 
least its posterior fourth, usually its posterior third to half; haustellum at 
least-as -longy as) hea dl Weights. fos cd a oe pg 2 a ek ee 2 
Third abdominal segment with a median posterior black spot, but without a 
Complete: ‘cross: Dang. 2 2 ek ee es SSO en eee 3 
2. Robust species; median marginals on first and second abdominal segments ; 
palpus 1.7 to 2.0 length of third antennal segment; outer verticals clearly 
CMILCTEMET ACU oe ee | Nee ee Viet Se deem ead major (Townsend) 
Slender species; no median marginals on either first or second abdominal 
segment; palpus about 1.3 length of third antennal segment; outer verticals 
hardly: difterentiated= 2.2 <-st> ESPs Eth) eae eee gracilis, new species 
38. Haustellum about 0.75 head height, cylindrical and straight; pollen of meso- 
notum deep yellow, almost golden____________________- aurea, new species 
Haustellum at least head height, attenuated and gently curved backward on © 
apical half; pollen of mesonotum with more of a whitish cast___---____ ee 
4, Haustellum not more than 1.3 head height___________ trifaria (Wiedemann) 
Haustellum about 1.5 to 1.6 head height_______________ glossata (Townsend) 
GENEA MAJOR (Townsend), new combination 
Geneopsis major TOWNSEND, Rev. Mus. Paulista, vol. 15, p. 311, 1927; Manual 
of myiology, pt. 4, p. 65, 1936; pt. 9, p. 221, 1939. 
Length, 8 to 9 mm. Head in ground color yellow except lateral 
occipital plates, which are blackish on approximately upper half; 
pollen brownish on frontalia, golden on parafrontals, pale yellowish 
on face and occiput. Hairs of parafrontals black, very sparse; those 
of upper half of occiput black, of lower half pale yellow. Outer ver- 
ticals present in both sexes. Antenna yellow, third segment infuscated 
except on basal two-fifths ventrally and inwardly; arista brownish 
yellow, blackish on its thinner part, the hairs concolorous. Haustellum 
cylindrical, distinctly constricted on apical half, most slender on pen- 
ultimate fourth, about 1.1 head height; color yellowish, becoming 
brownish toward apex. Palpus 1.75 (in female) to 2.0 (in male) 
length of third antennal segment; setulae black. 
Mesonotum, except humeri and sides, and certain pleural areas of 
variable extent, black in ground color, the black strongly obscured by 
pollen but tending to show through more noticeably than in some other 
members of this and related genera; pollen of mesonotum, scutellum, 
and upper parts of pleura golden, of rest of thorax pale yellow to 
whitish; inner vitta of mesonotum somewhat broader than diameter 
of a trichopore of a dorsocentral bristle. Hairs of mesonotum, scut- 
ellum, and upperparts of humeri coarse, black, those of lower parts 
of humeri and pleura rather fine, yellowish. Legs yellow, tarsi black- 
ish; coxae whitish pollinose, legs otherwise without pollen; some 
whitish hairs on coxae and at base of posteroventral surface of femora, 
legs otherwise black-haired. Wings hyaline; R, with setulae on 
