Occasional Papers of the Museum of Zoology 23 



peculiarities in hifoniiis which would not be expected to result 

 from mere polymorphism of wings, as it appears in other 

 groups, and hence the form may well be distinguished by a de- 

 finite name at least until its true nature is more fully under- 

 stood. 



Corythucha hesperia sp. nov. 



Membranous portions hyaline, with a general brownish 

 tinge," disc of pronotum brown; dorsal veinlets of hood brown; 

 paranota immaculate or with a faint brownish spot before 

 middle; median carina with a brown spot; lateral carinae and 

 apex of angulate process white. Hemielytra with broad and 

 distinct apical and basal brown bands ; without included clear 

 areoles, the extreme apical row of areoles hyaline. Antennae, 

 legs, and plates forming rostral groove light yellow. Body 

 piceous. 



Hood more than twice as high as median carina and some- 

 what longer, its height equal to length of carina and not quite 

 two-thirds its own length, its width three-sevenths width of 

 entire prothorax ; hood rather sharply constricted, posterior 

 lobe as long as anterior and twice as wide ; hood as seen in 

 profile rounded above, the anterior and posterior margins near- 

 ly straight. Median carina shorter than hood, distinctly arch- 

 ed, with two series of areoles at middle, its height nearly one- 

 third its length. Lateral carinae small, scarcely reticulated, 

 terminating far from base of hood. Costal margins of hem- 

 ielytra nearly straight, the spines rather long, about as far 

 apart as long; discal elevations of moderate size, with sharp 

 dorsal edge ; costal area largely triseriate. Antennae with 

 rather numerous long setae. Length, female 3.05 mm. ; width, 

 female 1.08 mm. 



Holotype female, Vernon, B. C, May 24, 1918 (W.D.), in 



