342 Or. C. P. AlexaiuUr on 



sr'.miouts li;?lit yellowish, the flajjcUar segments dark hrnwn; 

 ♦tfiuTiil coloration oF the hody hlack, the sides of tlie mcso- 

 notal pra'sciitum reddish brown ; halteres hlack ; legs with 

 tlie COX5C black, the apical tarsal segments pale ; wings 

 snbhyaline with a heavy dark brown pattern; vein /Vj^, 

 straight, per[)endienlar to the sector ; basal deflection (if 

 Cui at iibout mid-length of cell 1st M^. 



Male. — Length (excluding rostrum) 6'8 mm. ; wing 

 4'5 mm. ; rostrum alone 6 mm. 



Rostrum elongate, in the malt' sex at least, nearly as long 

 as the body, the extreme base brownish black, the I'emainder 

 of the drgan very pale yellow. Antennae witli the enlarged 

 basal segments conspicuously light yellow, the flagcllum 

 daik brown, the distal segments jjrovided with very long 

 hair-!. Head dark hrownish black, possibly discoloured, 

 paler adjoining the inner margin of the eye. 



iMesouotal pr;cscutum dark reddish brown, the lateral 

 margins very narrowly paler, the dorso-median area darker ; 

 remainder of the mesonotum black. Pleura black. Halteres 

 black. Legs with the coxae black ; trochanters pale testa- 

 ceous yellow ; femora brown, paler at the base ; tibiie and 

 tarsi darker brown, the apical tarsal segments pale whitish 

 brown, the claws reddish. Wings greyish subhyaline, with 

 a heavy dark pattern, arranged as follows : the single dark 

 brown spot is located at Scj, immediately above the origin of 

 Rs ; less intense browu spots on Ro+s continued along the 

 cord to the fork of ('n ; a similar l)ut narrower seam at the 

 outer end of cell ]s/ M^ ; a veiy sm;.ll cloud at the origin of 

 Rs ; a large blotch at the b::se of M ; large spots in the 

 cells, as follows : two in cell R, the outerniost much 

 the larger, subeqnal in size to the seam on /?2+8 ; f<">'' equi- 

 distant niaiks in cell M, each of the.-e divided intt) two 

 unccpial j)aits by a longitudinal oblitcrative streak in this 

 cell ; two spots in cell Ri, the |)roximal one larger; a lai-ge 

 blotch at the end of vein 2nd A, entirely traversing the cell ; 

 a small blotch in the middle of cell ]st A ; brown clouds at 

 the ends of veins M^, Cuy, and ('11.2 ; the apex of the wing in 

 cells ij's, 7^5, and il/j milky white ; the dark areas on the 

 wing are produced by the concentration of the microscopic 

 seta3 which coyer the membrane at these points; vein 7^i 

 yellow, the remaining veins dark brown. Venation : Sc^ 

 ending just beyond the origin of Rs, Sc^ being almost 

 exactly at this point ; Rs evenly and gently arcuate ; 

 ^^2+3 perfectly straight and perpendicular to the end of Rs, 

 so that cell 7^1 is almost a tiiangle ; cell \sf M., closed ; 



