SANBORN : KANSAS APHIDID.E. 29 



gall is large and elongated, tapering at both ends ; sides sunken 

 and irregular, due to the thin wall of the central cavity ; 24- c. 

 in height and 1 cm. at its greatest diameter. The walls are of a 

 leathery texture, green when young, turning to a straw color 

 upon reaching maturity. The gall is firmly fastened to the 

 leaf. The internal side of the gall is covered with plant-lice 

 which emerge through a crack which occurs along the side of 

 the gall, or some few through the small opening on the ventral 

 side of the leaf." 



The aphid is doubtless a new species which is somewhat simi- 

 lar to Colopliia ulmicola Fitch, but does not agree with it on ac- 

 count of its tuberculate honey-tubes and two discoidals in the 

 caudal wing. The illustration was made from a mutilated 

 specimen and consequently does not show all the parts perfectly. 



Subfamily LACHNIN^. 



Antennae generally equal to half the length of the body, six- 

 jointed. Beak long, extending to or beyond the mesocoxse. 

 Cephalic wings with three discoidals, the third one twice 

 branched. Stigmal vein nearly straight, stigma extra long, 

 inframarginal cell long and narrow. Caudal wings with two 

 discoidals. Legs extra long, especially the tibia^ of the hind 

 pair. Tarsi normal. Abdomen large and broad. Honey-tubes 

 tuberculate, somewhat inconspicuous. Style globular, incon- 

 spicuous or absent. 



This subfamily comprises our largest aphids. They live un- 

 protected and are usually gregarious on the limbs and trunks 

 of trees. Their coloration is of a protective nature, being simi- 

 lar to the surface on which they are found. 



Genus Laclinus Bermeisteb. 



Antenna? about half the length of the body, six-jointed ; the 

 third joint is the longest ; the fourth, fifth and sixth are nearly 

 equal in length. Beak very long, never shorter than half the 

 body and sometimes much longer. Wings long and broad, 

 stigma unusually long and narrow. The third discoidal is twice 

 branched, and the stigmal vein is nearly straight. The caudal 

 wing has two discoidals. Legs very long, especially the hind 

 pair. Honey-tubes tuberculate. Style inconspicuous or obso- 

 lete. This genus comprises some of the largest aphids known. 



