89 



the posterior extremity of the insect forms a semi-circle. Antennae 

 slender filiform, and slightly covered with brown hairs toward the 

 tip. Head and thorax black with violet reflection ; the thorax sur- 

 rounded by a golden margin; elytra bright green, with numerous 

 striae or minute longitudinal grooves. Under side of the body green ; 

 legs violaceous, long and rather slender; anterior tibiae, not notched. 

 Length from one inch to one inch and a fourth ; width of elytra at 

 widest point about half the length, or slightly less ; width of thorax, 

 scarcely one-fourth the length. 



Known to feed upon the canker-worm (Anisopteryx vernata, Peck)' 

 and the tent-caterpillar of the forest (Glisiocompa sylvatica, Harr.) 



C. calidum — Fabr. 



Head thorax and elytra similar in form to the preceding species, 

 except that the thorax is broader in propor- t Fi s- 2 -l 

 tion to the elytra, and the posterior lateral 

 angles extend slightly backward; the latter 

 are scarcely widened posteriorly ; anterior 

 tibiae also not notched. General color black; 

 elytra striate, each wing case being marked 

 with three longitudinal, parallel rows of 

 impressed golden dots. Length varies from 

 * nine-tenths to about one inch and one- 

 eighth ; width of the elytra about or slightly 

 more than three-eighths of the length; width Colosoma 

 Colosoma calidum. ' of the thorax about one-third the length. L ™ M 

 Known to prey upon upon the canker-worm, the Colorado potato- 

 beetle (Doryphora 10-lineata), and the May beetle (Phttlophaga fusca — 

 Forst). 



PASIMACHUS ELONGATUS — LeC. 



Abdomen pedunculated, that is to say, there is a space between the 

 hind margin of the thorax and front margin of the elytra ; anterior 

 tibias somewhat widened and flattened, toothed on the outer edge, and 

 the outer angle prolonged into a spine or long point ; a notch on the 

 inner margin. Head very broad, transverse^ quadrate ; thorax 

 broader than the elytra, somewhat heart-shaped, the angles promi- 

 nent, very large in proportion to the size of the body ; first joint of 

 the antenna? elongated, mandibles very prominent, strongly toothed, 

 surface a polished black, smooth ; elytra smooth, not striate, margin 

 blue ; sternum (breast) striated at the tip. Length about an inch ; 

 width of the thorax about three-eighths the length, head a little over 

 one-fourth, elytra a little under three-eighths.* 



Known to prey upon the Colorado potato-beetle. • 



ASPIDOOLOSSA SUBANGULATA — Chaud. 



Abdomen pedunculate; rather slender in form; thorax nearly as 

 wide as the elytra but rounded behind ; black. Antennae and palpi 

 reddish-brown; thorax black and not punctured, with a longitudinal 



Note.— *The measurement oi the width of a part is always made at the widest point, unless 

 otherwise expressly state'.!. 



