NEW ACALYPTRATE FLIES — WHEELER 307 



apically, bending toward and fusing with the first vein before its apex, 

 the latter somewhat thickened at its union with the costa. Anal cell 

 well developed, the anal vein ceasing abruptly before reaching the 

 wing margin; last section of fifth vein usually failing to reach wing 

 margin, its length a little more than half that of the posterior cross- 

 vein. A crossvein between the 2d basal and discal cells absent or 

 only partially indicated as a stub. Wings clear hyaline in tricolor 

 and lineata, blackish in infumata. 



Abdomen: Male genitalia large and complex, bent back beneath 

 abdomen (see figures). Female abdomen long and slender, tapering 

 at apex but not clearly telescoped. 



Remarks: The immature stages, food, breeding habits, etc., are 

 unknown. 



Latheticotnyia tricolor, new species 



Figures l,a-c; 2,a,b 



Figure l,a shows the general appearance of the male, without color 

 pattern, while figures 2,a,b represent the color patterns seen from the 

 side and from above. 



Male : Face and cheeks pale yellowish white, proboscis, palpi, and 

 clypeus yellow ; face with a median furrow from antennae to clypeus, 

 bounded by a semipromment ridge on each side, with smaller de- 

 pressed areas lateral to these; upper face, below and between antennal 

 bases, with 0-2 small dark hau-s and a few pale ones. Antennae 

 mostly brown on outer side, but yellow on lower apical edge and 

 mostly yellow on the inside except on upper margin and at apex; 

 both inner and outer margins of 2d segment rounded, not pointed; 3d 

 antennal segment subquadrate in shape, thickly covered with fine hair. 



Anterior orbital two-thirds length of second and one-half length of 

 third, the latter reclinate and inclined a bit outwardly, the other two 

 only weakly reclinate; orbits pale yellow behind middle orbital and 

 usually without additional hairs, becommg dark brown anteriorly, 

 this area with numerous short, black hairs. The divergent ocellars, 

 convergent postverticals, and divergent outer verticals about as 

 long as middle orbital; inner verticals longer. 



Mesonotal dark area (fig. 2, a) with thin gray pollen, especially 

 between dorsocentral rows; pale area of scutcllum yellow. Of the 

 five paiis of dorsocentrals, the last pair is the largest; no prescutellars ; 

 acrostichal hairs irregular, 2-rowed posteriorly, becoming more 

 numerous anteriorly. Scutellar disc with sparse scattered hairs, mostly 

 limited to the dark areas. Humeral callus pronounced, bearmg 4-5 

 black hairs in addition to the single upturned bristle; propleural 

 bristle upturned, arising from a small protruding knob. 



