NORTH AMERICAN COLEOPTERA. 223 



impression within it, surface more coarsely aud closely punctate than the thorax. 

 Body beneath colored as above, slightly greenish at the sides : abdomen moder- 

 ately, coarsely and closely punctate. Length .14 — .18 inch. ; 3.5—4.5 mm. 



This is one of tlie most easily known species in our fauna hy the 

 striking colors and the relatively coarse punctuation, which is, how- 

 ever, variahle in degree. The thoracic impression also varies in 

 depth, although at all times sharply defined and usually gradually 

 ev^anescent at its extremities. 



The male has a sinuation of the last ventral on each side, the in- 

 termediate lobe is semi-circular and has a sharply defined, impressed, 

 median line, which extends half the length of the segment. 



In the forms which occur in the Middle States region the color is 

 more decidedly blue, but there can always be seen the tendency to 

 cupreous or violaceous bicoloration. 



One of our most widely distributed species, and consequently 

 showing a tendency to vary locally. The form described by Le- 

 Conte as torquata, from two individuals, has the thoracic impression 

 rather less impressed, but otherwise shows no important difference 

 from the large series examined. 



Occurs from Bennington County, Vt., (Roberts) southward to 

 Pennsylvania, thence west to the entire Pacific region and Arizona. 



From Los Angeles Mr. D. W. Coquillett writes that it injures 

 the grape vines by eating the leaves. 



7. H. caliroriiica. Mann. — Short oval, convex, facies robust, shining blue. 

 Autennse half as long as the body, piceous, basal joints bluish, joints 2-3-4 grad- 

 ually longer. Head shining, with a few scattered punctures, frontal carina ob- 

 tuse, tubercles small aud indistinct. Thorax one-half wider than long, narrowed 

 in front, sides regularly arcuate, margin very narrow, disc convex, ante- basal 

 groove obliterated at middle, faintly visible at sides only, surface sparsely, tinely 

 punctate with an oblique series of coarser punctures beginning at the front 

 angles. Elytra not wider at the base than the thorax, humeri rounded, umboue 

 feeble, smooth, surface with very indistinct, sparse punctuation, smooth at apex 

 aud sides. Body beneath and legs bluish ; abdomen sparsely punctate. Length 

 .18 inch. ; 4.5 mm. 



This species has much the form, color and general appearance of 

 Gustrophysa cyaiiea. From the other robust blue species it is best 

 distinguished by the characters of the table. It is very closely re- 

 lated to obliterata, but the shining surface and shorter form will 

 readily distinguish it. 



One female (from Mannerheim), California. 



