CLASSIFICATION AND DESCRIPTION OF COMMON INSECTS 287 



low; under surface and legs pale brownish-yellow; abdomen black; 

 elytra dark blue and deeply striate; antennae pale; head finely wrinkled; 

 tarsal claws comb-shaped; tibial spurs short; thorax but little wider 

 than head and much narrower than elytra. 



Harpalus caliginosus Fab. — Pitchy black, length 21-25 mm.; an- 

 tennae and tarsi reddish-brown; legs black, thorax broader than long, 

 narrow in front, as broad as base of elytra nearly square; elytra 

 deeply striate and without a dorsal puncture on third interval, and 

 sinuate at tip. A seed-eater. 



Harpalus pennsylvanicus Dej. — Black, length 13-15 mm.; antennae 

 and legs reddish-yellow; under surface reddish-brown to piceous; 

 sides of thorax gradually curved; region of basal angles strongly de- 

 pressed, densely punctate; mentum toothed. 



Metallic Ground Beetles: 



Calosoma scrutator Fab. — (Searcher). Length 28-30 mm.; disk of 

 thorax blue; margins reddish-bronzed, sides and angles rounded; legs 

 blue, abdomen green and red; elytra metallic green with red margin, 

 striate, punctured; third joint of antennae compressed. 



Calosoma calidum Fab. — (Fiery Hunter). Length 22 mm.; 

 black above and below; elytra black with six rows of golden spots, 

 deeply striate and finely punctate; head and thorax finely rugose; 

 third joint of antennae compressed. 



Calosoma sycophanta Linn. — A European form imported to combat 

 the Gypsy and the Brown-tail moths. Both larvae and adults are 

 predaceous and freely climb trees in search of their prey. The eggs 

 are deposited in the earth and the mature larvae seek the earth again 

 and construct pupal cells. The adult beetles emerge late in the spring. 

 They are about an inch long, and of a beautiful green color. (See Bull, 

 loi, Bur. Ent., U. S. Dep. Ag.) 



COCCINELLIDiE (LADY-BIRD BEETLES) 



(Consult Bull. 181, Conn. Agr. Exp. St. and "Coleoptera of Indiana.") 

 Lady-bird beetles are essentially feeders on plant-lice and scale 

 insects; both as adults and larv£e; hence are of great economic impor- 

 tance. (See Part I, Beneficial Insects.) 

 Common Lady-birds: 



Two-spotted Adalia {Adalia bipundata Linn.). — Wing-covers red 

 with a black spot in the centre of each; thorax black-margined with 



