82 THE GENUS CORYTHUCHA 



are comparatively fresh specimens, while those from which the 

 specific description was made are ten years older, hence a fading 

 in color markings, and in these older specimens many of the spines 

 seem to have been rubbed off. Osborn and Drake record their 

 var. spinata from "thistle." 



9. Corythucha hoodiana Osborn and Drake 



1917. Corythucha lioodiana Osborn and Drake, Ohio Jr. Sci., xvii, no. 8, p. 302. 



Height of hood equals one-half its length, and its length about equal to 

 length of median earina. Median earina large, with two rows of areoles and 

 about as high as hood. Lateral earinae rather large with distinct areoles. 

 Retieulations of hood large. Sjiines on membranous margins and nerviu-es 

 small and scarce. Size, 4.3 mm. long, 2.6 mm. wide. 



Nervures yellow. Light browii spot on paranota. Brown band at base 

 and apex of elytra. Apical band with' three large hyaline areoles and width 

 about one-quarter the length of elytra. 



The species was described from a single specimen taken on Alt. 

 Hood. Oregon. Food plant unknown. Type examined. 



10. Corythucha contaniinata new species 



IVmotal hood slightly higher and shorter than median carina, its height 

 is at least one-half its owni length. Lateral earinae long with distinct areoles. 

 Reticulations of hood not over twice the size of those of the membranous 

 pronotal margins. Spines on membranous margins small. Size, 3.5 mm. long, 

 2.3 mm. wide. Nervures of hood embrow^led. 



Two brown spots on paranota. Browni bands at base and apex of elj-tra, 

 apical band narrow with several hyaline areoles. Timiid elevations em- 

 brownied and a small brown spot at center of costal margin of elytra. 



Type. — 9, Moscow, Idaho. Allotype. — cf, Moscow, Idaho. 

 Parotypcs. — Three males, Moscow. Idaho. (Collection of U. S. 

 Xat. Museum.") 



Other specimens are at hand from Oregon and California, 

 from Ceafwthus cardulatus. Contaminafa is a Uhler manuscript 

 name. Osborn and Drake place it synonymous with distinda. 

 The author, however, after examining specimens labelled in 

 Filler's own handwriting, and from his collection, concludes that 

 this is a distinct species. It may be easily separated from dis- 

 tincta Osborn and Drake by the comparatively low hood and 

 shorter lateral earinae. 



11. Corythucha pallipes Parshley, new species 



Hood higher but not twic^ as high as median carina, its height equals to 

 one-half or more of its own length. Length of hood and median carina about 

 equal. Reticulations of hood large. Spines on membranous margins long, 



