Occasional Papers of the Museiuii of Zoology 19 



slightly more than one-third entire width of prothorax; hood 

 sharply constricted, posterior lobe circular in outline as seen 

 from above and a little more than twice as wide as the narrow 

 parallel anterior lobe ; hood as seen in profile low, anterior and 

 posterior margins straight, forming a very obtuse angle, the 

 apex rounded. Median carina slightly shorter than hood, 

 slightly arched anteriorly, with two series of areoles at middle, 

 four times as long as high. Lateral carinae moderately de- 

 veloped, with two or three areoles, terminating at a distance 

 from base of hood equal to height of median carina. Costal 

 margins of hemielytra slightly convex ; spines of costal and par- 

 anotal margins very rudimentary ; discal elevations rather small, 

 not reaching middle of hemielytra, with sharp dorsal edge ; 

 costal area largely triseriate. Antennae with rather numerous 

 long setae. Length, male 3.48 mm., female 3.57 mm.; width, 

 male 2.00 mm., female 2.08 mm. 



Holotype female, Vernon, B. C, Sept. 28, 1918 (W. D.), in 

 National Collection at Ottawa ; allotype, same data ; four para- 

 types, same data, in collections of Downes, Van Duzee, and the 

 writer. 



This species has befen taken on willow. It runs to 21 in Gib- 

 son's key and resembles distincta in general appearance, being 

 distinguished as follows : hood much lower and narrower, later- 

 al carinae smaller and terminating far from base of hood. It 

 is larger than pergandei Heidemann, lacks distinct marginal 

 spines, and is of a totally different habitus. C. contaminata 

 Gibson is of narrower form, has larger lateral carinae with 5 

 or 6 distinct areoles, and is provided with marginal spines. 

 CorythncJia padi Drake. 



B. C— Coldstream, V. I., June 2, 1918 (W. D.) ; Vernon, 

 Apr. 17, 1915, July II, 1914 (AI. H. R.). 



Reported by Downes from "alder and hazel." In the original 



