11KM1PTKKA JIO.MOPTKRA APHIDES. 261 



ing apically, tlie second much smaller, subconical, the remainder very 

 slender, filiform, much longer than the fore wings, the third joint alone as 

 long as the whole body. Fore wings with the stigmatif vein more than 

 usually longitudinal, arising from before the middle of the very narrow and 

 elongated stigma, so that the very narrow stigmatic cell is more than a 

 third as long as the wing. Cubital vein twice forked, the first time far from 

 its origin (a third or half way to the extremity of the first branch), which is 

 usually about midway between the first oblique and cubital veins, but 

 varies to some extent, and in any case only a little before the origin of the 

 stigmatic vein, the second time not far from half-way from the first forking 

 to the apex of the wing. Second oblique vein arising nearer the first oblique 

 than the stigmatic vein, sometimes only to a slight extent, sometimes 

 twice as near it, generally very straight, the first oblique at such an 

 angle with it that the first discoidal cell between them, pretty wide at 

 base, is from three to six times as wide on the hind margin of the 

 wing. Legs very slender, the hind femora fully reaching the tip of the 

 abdomen, the rest of the hind legs only a little shorter than the fore wings. 

 Abdomen rounded ovate, somewhat broader than the thorax, fullest behind, 

 with an extremely short and rather stout cauda, and very short and remark- 

 ably stout conical cornicles. 



Table of the aperies of Aphidopsis. 



Fore Willis more than three millimeters long. 

 Cubital vein arcuate throughout. 



First cubital branch much nearer to the second cubital branch than to the second oblique vein. 

 Cubital vein approaching the stigmatic vein very closely ; fore legs longer than middle 



legs 1. ./. subltrna. 



Cubital vein not approaching the Htigmatic vein very closely; fore legs shorter than mid- 

 dle legs a. A. hargrri. 



First cubital branch equidistant from second cubital branch and second oblique vein. 



It. .1. lutarin. 

 Cubital vein angularly bent at furcations. 



Expanse of winga nine millimeters or less; first discoidal cell normally divergent. 



I.I. inilriiilrilin. 



r.\p:iti^e uf wings eleven millimeters or more ; first discoidal cell not very divergent. 



5. A. dalli. 

 I 'urc iii^-s let- lli an three millimeters long t>. .-I. cmm-iat.i. 



1. APHIDOPSIS SITHTERNA. 



Ili-ad and thorax testaceous, slightly mottled with pallid. Antenna? as 

 long a> the tore wings. \Viugs slightly less than three times as long as 

 broad, the poM.-i^tal moderately light, running uninterruptedly into the 

 very slender elongated stigma. First transverse vein very slender, nearly 



