HEMIPTERA—IJOMOPTERA— APHIDES. 261 



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

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

 long as tlie whole body. Fore wings with the stigmatic veiil 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 tlian 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 nndway 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 tlie 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 species of Ajyliidopsis. 



Fore wings 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 louger than middle 



legs 1. A. subterna. 



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

 dle legs 2. A. hargcri. 



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



:?. A. hitaria. 

 Cubital vein angularly bent at furcations. 



Expanse of wiugs nine millimetersor less ; first discoidal cell normally divergent. 



4. A. margarum. 

 Expanse of wiugs eleven millimeters or more ; first discoidal cell not very divergent. 



5. A. dain. 

 Fore wings less than three millimeters long (j. A. emaciata. 



1. Aphidopsis SUBTERNA. 



Head and thorax testaceous, slightly mottled with pallid. Antennfe as 

 long as the fore wings. Wings slightly less than three times as long as 

 broad, the postcostal moderately light, running uninterruptedly into the 

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



