20 University of Michigan 



description Drake describes the costal margin as "concave, 

 sinuate," while Gibson in his redescription makes it "nearly 

 straight." In this series of 15 specimens some variation in this 

 character is to be observed, but all show more or less concav- 

 ity. Certain specimens also exhibit the paler colors and the 

 medial evanescence of the apical band mentioned by Drake. 

 Corythiicha salicata Gibson. 



B. C.— Saanich Dist., Y. I., Mixy 8, Sept. 28, 1918 (W. D.) ; 

 Vernon, April 23, 191 5 {'M. H. R.). 



Taken by Downes on alder. The markings in this species 

 are even more variable than indicated in the original descrip- 

 tion, ranging from \tvy distinct to almost obsolete. The apical 

 marking of each hemielytron, when well developed, forms an 

 oblique band situated at some distance from the apex. The 

 reticulation of the hood is also somewhat variable, the areoles 

 of the hood being in some cases rather larger tlian those of the 

 paranota. 

 Corythncha maruiorata Uhler. 



B. C.— Vernon, July 11, 1914 (M. H. R.). 



Corythucha marmorata var. informis var. nov. 



^Membranous portions milky white as a rule, many of the 

 areoles hyaline at center; disc of pronotum brown; edges of 

 angulate process and lateral carinae white ; hood with a nar- 

 row transverse brown band on posterior lobe and two longi- 

 tudinal stripes on anterior; paranota with a large brownish spot 

 at middle and often a smaller one posteriorly; median carina 

 with a brown spot. Hemielytra with apical, basal, and inter- 

 mediate transverse brown bands, made up of more or less con- 

 fluent spots of which there are three in each costal area and 

 one on each discal elevation ; the apical band divided trans- 



