338 ENTOMOLOGICAL NEWS [Oct., '09 



form of the antennae all indicate a close relationship of this 

 genus with Macrosiphum. It is clearly differentiated from 

 Macrosiphum and any other named genus by the wing charac- 

 ters. The radial sector* is short and strongly curved. The 

 media is typically two branched. The cubitus and first anal 

 are heavily shadowed. The hind wing is minute, the tip ex- 

 tending only to about the first anal of the fore wing, and is cor- 

 respondingly narrow. The costal hooks of the hind wing are 

 very near the tip of the wing. Typically the hind wing has only 

 the radius. The shape and relative size of these wings are bet- 

 ter indicated by the accompanying figures than by a detailed 

 description. 



Microparsus variabilis n. sp. 



The species under consideration is one of the most peculiar 

 yet found in the family. I listed it first as Macrosiphum n. sp. 

 as the cauda and cornicles would indicate. The head and an- 

 tennae show Myzus tendencies, but the wings throw it out of 

 any present genus. The heavy shadowing of the first anal and 

 cubitus suggest the shadowed veins common in Calliptcrus. 

 The two-branched media together with the frequent occurrence 

 of a reversion of the three-branched condition presents a case 

 similar to that of Toxoptera. The exceedingly small hind 

 wing, however, and the very peculiar shape of the fore wing 

 correlated with this are inconsistent with the characters of any 

 named genus. 



Mr. Sanborn in "Kansas Aphididse" describes and figures 

 the winged viviparous form of this or a closely allied species 

 as Macrosiphum n. sp. and corrects this to new genus, new 

 species in "Errata to Part I," but suggests no name in either 

 instance. 



This species may be Macrosiphum desmodi Williams which 

 he lists on Desmodium canadcnse but as that species is nomcn 

 nudum there is no means of ascertaining. 



Mr. J. T. Monell collected the same species thirteen years 



*For the wing vein nomenclature, the reader is referred to "Homolo- 

 gies of the wing veins of Aphididae, Psyllidae, Aleurodidae and Cocci- 

 dae." Annals of the Entomological Society of America. June, 1909. 



