CONOSIA. 497 



thorax ; tip obtuse in male, pointed in female. Genitalia of male 

 small and inconspicuous. Legs long and slender, microscopically 

 pubescent. Wings very much shorter than the abdomen, com- 

 paratively broad, bare of pubescence. Two submarginal, five 

 posterior cells, and a discal cell; anterior cross-vein distinctly 

 hegond the discal cell ; auxiliary vein ending beyond middle of 

 wing, the 1st longitudinal ending just beyond it ; 2nd vein 

 beginning before middle of wing, forking at about half its length, 

 the marginal cross-vein just beyond the fork; the 3rd vein beo-ins 

 at the fork of the 2nd, gently bisinuate; the 4th vein with upper 

 branch forked well beyond the discal cell, the lower branch forked 

 at distal end of that cell, which latter is pentagonal ; anterior 

 cross-vein distinctly beyond discal cell, posterior cross-vein before 

 its middle, oblique; 5th, Gtli and 7th longitudinal veins nearly 

 straight ; anal angle of wing somewhat rounded. 



Range. The Orient, China, Japan, and Australia. 



The most pertinent characters of this genus, which possesses 

 but a single widely distributed species, are the conical production 

 of the thoracic dorsum over the head, and the position of the 

 anterior cross-vein distinctly beyond the discal cell. 



358. Conosia irrorata, Wied. (PI. X, fig. 5.) 



Limnohia irrorata, Wiedemann, Ausser. Zweifl. i, p. 574 (1828). 

 Limnobia siihstituta, Walker, List Dipt. Brit. Mus. i, p. 39 (1848). 

 Limnophila crux, Doleschall, Nat. Tiids. Ned. Ind. xiv, p 388 

 pl.iv, fig. 8(1857). ^' 



S $ . Head: eyes well separated above, contiguous below for a 

 short distance ; from vertex to back of head rather bright 

 yellowish grey. Proboscis and palpi brownish yellow or brown, 



Fig. A^.— Conosia irrorata, Wied., lateral view of head and thorax. 



both short. The 1st scapal joint of antennae cylindrical, elongated, 

 with some stiff hairs, 2nd joint short, but of good size, rounded^ 

 with very few hairs ; the 1st flagellar joint obconical, with micro- 

 scopic grey pubescence, smaller than 2nd scapal joint but much 

 larger than the other flagellar joints, the basal ones of which in 

 the male are shortly cylindrical, the remainder elongated, all with 

 a few very long hairs each, the shorter pubescence being more 

 pronounced on the basal joints. In the female all the flagellar 

 joints after the 1st are uniformly shortly cylindrical, all bearino- 



