A REVISION OF NORTH AMERICAN CHRYSOBOTHRINI 165 



Newton, September 1911; Frainingham, June 29, 1926; Monterey, July 9, 



1919 (C. A. Frost). 

 New Brunswick : Penobsquis, July 31, 1926 (C. A. Frost). 

 New York : West Point, June 28 to September 15, 1912 (W. Robinson). 

 Quebec: Ft. Coulonge, June-August (J. I. Beaulne). 

 South Dakota: Buffalo Gap (A. E. Hall). 



Also recorded in the literature from : 



District of Columbia: Washington (Ulke 1902). 



Indiana: Lake and Knox Counties (Blatchley 1910). 



Michigan : Lake Superior region ( Horn 1886 ) . 



New Mexico: Capitan, April (Chamberlin 1926). 



Pennsylvania: Hogestown, reared; Rockville, July 21; Endeavor, July 30; 



Charter Oak (Knull 1920, 1922). 

 Texas: Davis Mountains, April 10 (Horn 1886). 



Hosts. — This species has been reared from the bark of dead pitch 

 pine {Pinus rigida Miller), northern white pine {Pinus stroous Lin- 

 naeus), Virginia pine {Pinus virginiana Miller), and tamarack 

 (Larix laricina (DuRoi) Koch). 



The color is rather constant, except on the head, which varies 

 from bright green to bronzy green. In most specimens examined 

 the first costa on each elytron is distinct posteriorly, but in a few 

 specimens it is rather indistinct and more or less interrupted. The 

 sides of the pronotum are usually subparallel at the middle, but in 

 a few specimens examined the sides are strongly converging from 

 near the apices to the posterior angles. The clypeus is either trian- 

 gularly or arcuately emarginate in front. Horn (1886) separates 

 this species from calif ornica on account of its having a submarginal 

 serrate ridge on the last visible abdominal sternite, but this species 

 can hardly be considered as having a submarginal ridge, as this char- 

 acter is rather variable; at most, it is only indicated on each side of 

 the last visible sternite at the basal half, whereas in some specimens 

 it is scarcely noticeable. The length is from 10 to 13.5 mm. 



(71) Cheysobothris canadensis Chamberlin 

 (Fig. 68 ; fig. 121, B) 

 Chrysobothris canadensis Chamberlin, 1934, Pan-Pacific Ent. 10 : 37, fig. 12. 



Male. — Broadly elongate, strongly flattened above, moderately shining, brown- 

 ish black, with a faint purplish reflection on elevated, smooth spaces, cupreous 

 and bronzy green in depressions ; beneath purplish brown, with a distinct bronzy- 

 green reflection in certain lights, and more strongly shining than above. 



Head bronzy green, with a broad, short, longitudinal carina on occiput, and two 

 small, smooth callosities on front; front slightly convex; surface coarsely, deeply 

 foveolate-punctate, rather densely clothed- with moderately long, erect, incon- 

 spicuous hairs, intervals finely granulose ; clypeus broadly, deeply, angularly 

 emarginate in front, obliquely subtruncate on each side. Antenna bronzy green, 

 slightly cupreous, gradually narrowed to apex; intermediate segments not 

 compact, as long as wide, broadly subtruncate at outer margins ; third segment 

 distinctly shorter than following two segments united. 



Pronotum nearly twice as wide as long, wider at base than at apex, widest 

 along middle ; sides parallel along middle, arcuately converging at base and apex ; 

 anterior margin arcuately emarginate, without a distinct median lobe ; base 

 slightly, arcuately emarginate on each side, median lobe slightly produced, and 

 narrowly truncate in front of scutellum; disk slightly convex, uneven, with a 

 longitudinal, median sulcus extending from base to apex, two broad, irregular 

 depressions on each side, one near anterior margin and the other near base, and 

 with numerous small, irregular, smooth spaces ; surface coarsely, deeply, irregu- 

 larly punctate between the smooth elevations. 



