308 REPORT OF THE COMMISSIONER OF AGRICULTURE. 



v< in of front wing close to costa, and furnished with two or three bristles; marginal 

 vein longer and s1 outer than submarginal ; stiginal short and oval; post-marginal 

 plainly present, but shorter even than the stigmal. Color, dark metallic green; 

 wing veins brown; all legs eoneolorous with body, tarsi brown, and each tarsal joint 

 with a central metallic binge. 



The male differs in its longer abdominal petiole, and in a more marked division of ■ 

 the club into two joints. 



Described from 5 9 and 3 8 specimens, bred from larvae of Phyllotrcta 

 zimmermanni mining leaves of Lepidiuin, in Missouri. 



THE COLORADO CABBAGE FLEA-BEETLE. 

 (Phyllotreta albmiica, Le Oonte.) 

 Order ColeopterA; Family Chrysomelidje. 

 [Plate IX ; Fig. 7.] 



Another flea-beetle injurious to Cabbage and other Cruciferous rrtants, 

 is common in June and July throughout the Rocky Mountain region of 

 Colorado, having been found in great numbers at the very highest 

 elevations. It is somewhat smaller than the preceding species, and of 

 a uniform, deep, polished, olive green color, and irregularly punctate. 

 The antennas are dark and pubescent, with joints 3, 4, and 5 reddish- 

 brown. Its larval history has not been recorded, but will probably 

 resemble that of vittata. 



There is another species (P. orcgonensis, Crotch) which occurs on the 

 Pacific coast, and which very closely resembles vittata. We have re- 

 ceived it from Mrs. A. E. Bush, of San Jose, Cal., and it doubtless 

 affects Cabbage there. 



THE COLOEADO POTATO-BEETLE. 



(Doryphora deccmlineata, Say.) 



Order Coleoptera j family Chrysomelid^. 



The Colorado Potato-beetle is too well known to need extended com- 

 ment. We may refer to our first, fourth, sixth, seventh, eighth, and 

 ninth Missouri Reports, and to our Potato Pests, published by Orange 

 Judd Company, New York, for full accounts of this insect. In treating 

 of cabbage insects, however, the following paragraphs from the fourth 

 report should not be omitted, though experience since has shown that 

 the habit is quite exceptional, and that the cabbage-grower has nothing 

 to fear from this insect : 



New food ; cabbage. — It is a notable fact, and a most, important one for us, that 

 the Colorado Potato-beetle has iu the past been found incapable of flourishing on any 

 other plants but those of the nightshade family (Solanacecv), aud hitherto it has only 

 been known to thrive upon the nightshade genus proper (Solatium), which includes the 

 egg plant, the horse nettle, and some other wild species west of the Mississippi, such 

 as rostratum and cornutum, which are known by various popular and local names. 

 Upon the nettle (S. caroUnense), which is common with us, but is mostly replaced in 

 Kansas by the S. rostratum, it seems to delight even more than upon the potato, and 

 I have found it quite injurious to other plants of the same genus, such as warxcewiczi, 

 rob us turn, discolor, and sieglinge, which are often cultivated for their ornamental foli- 

 age. The other common plants of the family, such as the tomato (Lycopersicum), 

 ground-cherry (Physalis), thorn-apple (Datura), henbane (Hyoscyamus), apple of Peru 

 (Kicandra), tobacco (JSHcoriava), belladonna, petunia, and cayenne pepper, are not over 

 much to its liking, though upon a pinch it will feed on all of them, and especially on the 



