March, 1905.] WlCKHAM : COTALPA OF NORTH AMERICA. 3 



stripe, extending the entire length, narrower at apex and extending 

 along the basal margins to the humeri where it is recurved, giving 

 somewhat the appearance of a broad T. I propose for it the name 

 Cotalpa tan. 



C. subcribata n. sp. Form robust, as in C. lanigera. Above 

 yellowish, head, pronotum and scutellum greenish with metallic reflec- 

 tions, pronotal margin dark green. Head densely, confluently punc- 

 tured in the region of the clypeal suture, the punctures growing sparser 

 towards the occiput, which is smooth and polished. Clypeus slightly 

 transversely convex, margin narrowly reflexed, angles broadly rounded, 

 front edge nearly straight, surface densely and somewhat confluently 

 punctured. Mentum emarginate anteriorly, the lower face with two 

 obtusely elevated ridges arising near the front angles and converging 

 posteriorly. Terminal joint of maxillary palpi deeply impressed. 

 Pronotum a little less than twice as broad as long, widest near the 

 middle, base broader than apex, sides arcuate, not angulate, surface 

 polished and with double punctuation ; the larger punctures are dis- 

 tant and fairly uniformly distributed except near the sides, where they 

 become crowded, the fine ones following the same general plan. The 

 side margins thus acquire a rugulose appearance. Median line vague, 

 visible only in certain lights. Scutellum green, rather coarsely punc- 

 tured, more densely near the base. Elytra dull yellowish, not me- 

 tallic, strongly, closely and subconfluently punctate over their entire 

 surface. Body beneath dark green, shining, more or less metallic, 

 thickly punctured and hairy, the middle of the abdomen less densely 

 clothed than the rest. Legs yellow with metallic green reflections, 

 tarsi darker. Length, .68-. 75 inch. 



This form is most nearly allied to C. lanigera Linn., but presents 

 a very different appearance on account of the coarse and close punctu- 

 ation of the elytra and the much smaller size. My specimens are all 

 females, one of them showing the subangulate elytral margin with 

 accompanying tubercle which is so well marked in C. flavida (and 

 which occurs less frequently in C. lanigera) while in the other two 

 this structure is wanting. 



Described from three specimens taken by Mr. Warren Knaus at 

 Medora, Kansas, in July. In response to inquiry, Mr. Knaus writes 

 me that all of his specimens from southwestern Kansas agree in the 

 small size and strong punctuation so characteristic of this insect. 



C. flavida Horn, Trans. Amer. Ent. Soc, VII, 1878, p. 53. Of 



