SANBORN : KANSAS APHIDID.E. 4 



o 



Wing hyaline, long, with slender veins. Legs moderately long. 

 Honey-tubes short, cylindrical, narrow, not longer than the 

 style. Latter small, pointed, and curved upwards. 



Genus Mastopodd, Oestlund.'^ 



AntenniP as long as the body, six-jointed, the third and seta- 

 ceous sixth being the longest, on no frontal tubercles. Eyes 

 dark red. Beak moderately long. Wings rather short and 

 broad, detlexed in repose ; venation typical. Legs rather long, 

 with the tarsi and claws atrophied. The tibi?e are truncate at 

 the tip and furnished with a membrane, the structure of which 

 seems to be similar to that of Diptera, as they are able to walk 

 with ease not only on the perpendicular but also on the uiider 

 surface of a glass plate. The upper side of the tibial tip is 

 furnished with a small tubercle, which probably represents the 

 claws. 



Genus Sipha Passerini. 



This genus resembles Apliis, with the exceptions of having 

 longer wings (see figure) in proportion to the body, and shorter 

 antennae, being but six-jointed and extending but little beyond 

 the thorax. 



"Genus Aphis Linn. 



Antenmr usually a little longer than the body. Frontal tu- 

 bercles none or very rudimentary. Eyes red or black. Beak 

 variable in length. Wings rather short and broad, defiexed in 

 repose, venation typical. Legs moderately long. Abdomen 

 short and broad, rounded or obtuse behind. Honey-tubes of 

 moderate length, cylindrical or sometimes slightly incrassate, 

 very rarely obsolete. Style short, thick, conical, and usually 

 prominent. 



Genus Siphocoryne Passerini. i'' 



Antenna' on no frontal tubercles, and shorter than the body ; 

 third joint with many sensoria, which causes it to appear ser- 

 rate on the ventral side ; seventh joint not longer than the 

 third. Beak short to moderately long. Wings rather short 

 and broad, defiexed in repose. Legs moderately long. Honey- 

 tubes moderately long but sometimes extending a little caudad 



