H. C. FALL. . 155 



in front, the sides very broadly nearly evenly arcuate, punctuation 

 more evident, though very fine. Length 3-3.5 mm. 



California (San Diego, type; Pasadena). 



Numerous specimens. A single specimen taken by the 

 writer in the San Bernardino Mountains is still smaller but 

 apparently identical. One example from Alameda County is 

 included provisionally ; the prothoracic groove is a little less 

 developed, but I think this is only an individual variation. 



H. nitidiventris n. sp. 



Oval, convex, deep blue, polished and strongly shining both above 

 and beneath. Antenna? rather slender, longer than half the body, 

 piceous, basal joints paler, the third and fourth equal in length. Eyes 

 small, not prominent, their width as seen from the front but little more 

 than one-fourth the interocular width ; frontal tubercles flat, vertex 

 smooth, frontal carina moderate, acute. Prothorax about one-fourth 

 wider than long, sides evenly arcuate, base but slightly wider than the 

 apex, basal margin evenly arcuate from side to side, hind angles 

 minutely dentiform and prominent, front angles thickened and ob- 

 liquely truncate, basal groove very deep and entire, surface very 

 sparsely, barely visibly punctulate, a few coarse punctures in the 

 antero-lateral region. Elytra one-third longer than wide, fully three- 

 fourths wider than the prothorax, and a little less than three times as 

 long ; disk broadly not strongly impressed behind the humeral urn- 

 bone, punctuation fine, sparse, becoming obsolete apically. Body 

 beneath shining and very sparsely and finely punctate. Length 2 f mm. 



El Taste, Lower California. One example, collected by 

 Mr. Beyer. 



By the deep entire prothoracic groove this species will be 

 associated with ignita and allies. It may at once be sepa- 

 rated by its small size, small eyes, which are but little more 

 prominent than the postocular parts, and the shining ventral 

 surface. This is possibly the insect recorded by Horn as 

 ignita in the Lower California List. 



H. convicta n. sp. 



Elongate oval, twice as long as wide, cupreous, moderately shining, 

 head distinctly, prothorax and elytra obscurely alutaceous. Antenna; 

 stout, two-thirds as long as the body, testaceous, apices of the outer 

 joints more or less dusky ; joints 2-3-4 gradually longer, fourth but 

 little more than twice as long as wide. Eyes moderate, their width as 

 seen from the front less than half the interocular width ; frontal tuber- 

 cles flat, but evidently elevated above the contiguous portion of the 



TRANS. AM. ENT. SOC, XXXVI. JUNE, 1910. 



