70 GEO. H. HORN, M. D. 



T. L<«wisii Crotch, Proc. Acad. 1873, p. 56. 



This name was suggested by Crotch for a form supposed to be a 

 variety of nitldicollis, but it seems to be a valid sjDecies. While it 

 has the form and color of that species the occiput has a large trans- 

 verse plaga, the thorax is sparsely punctate and obliquely impressed 

 each side, the elytra are not subtruncate, and the sutural angle is 

 obtuse. On the whole, it is a little smaller than niticUcollis, but 

 otherwise agrees in color and sculpture. 



Occurs in Colorado. 



T. didncta n. sp. — Oblong nearly, parallel, yellowish, elytra with bluish 

 green vittie. Antennse brownish, pale at basal half, fifth joint not longer than 

 the third. Head yellow, a small occipital spot, in and around which are a few 

 coarse punctures. Thorax a little more than twice as wide as long, sides strongly 

 arcuate, disc with a deep transverse depression at middle, surface indistinctly 

 sparsely punctate and with the usual piceous spots small; scutellum piceous, 

 bordered with yellow, or entirely pale; elytra in great part yellow, with a nar- 

 row bluish green sutural vitta, a broader vitta from the humerus, which often 

 joins the sutural near the apex, between these a narrow bluish line not reaching 

 the base, surface densely finely punctured, but less so at base, very finely and 

 indistinctly pubescent; epipleurse, body beneath and legs, entirely pale. Length 

 .24 — .28 inch. ; 6 — 7 mm. 



Male. — Last ventral broadly, but not deeply emargiuate; claws very narrowly 

 bifid at tip, the inner portion a little shorter. 



Female. — Last ventral broadly semicircular, with a very small semicircular 

 notch at middle: claws more deeply bifid, the parts more divergent, the inner 

 shorter. 



This species resembles mtidicollis more than any other, but differs 

 in its shorter and broader thorax, with deep transverse depression 

 and punctate surface. In this species the apices of the elytra are 

 rounded and the sutural angle very obtuse. 



The only variation observed in this species is in the extent of the 

 narrow blue line between the sutural and lateral vittaj. 



Occurs in western Nevada and adjacent regions of California. 



T. convergeiis Lee, Proc. Acad. 1865, p. 220. — Oblong, nearly parallel, 

 body Ijeneath almost entirely piceous, above pale yellow, the elytra with metal- 

 lic-green vittfB. Antennaj piceous, the basal joints paler, fifth not longer than 

 third. Head yellow, with a broad, transverse occipital piceous space, the surface 

 rather coarsely punctured. Thorax less than twice as wide as long, not narrowed 

 in front, sides arcuate, disc vaguely obliquely impressed each side, surface 

 coarsely sparsely punctate; color yellow, with three piceous spots; scutellum 

 piceous ; elytra rather coarsely and somewhat roughly punctate, pubescence 

 distinct, but not close, color in greatest part metallic-green, the side margin and 

 apex yellow, and a yellow vitta on the middle of each elytron, nearly reaching 

 the apex, usually parallel-sided, sometimes slightly narrower to tip; epipleurse 



