284 GEO. II. HORN, M. D. 



in front of the coxae acutely carinate, the lobe rather broad, not elongate. Body 

 beneath subopaque, coarsely punctured at the sides of the coxal plates and first 

 two ventral segments, the remainder of the surface somewhat rugulose. Legs pale, 

 antennae infuscate toward the tip. Length .10 inch; 2.5 millim. PL IX, fig. 4. 



This species is referred to Dr. Sharp's Section C. of Group 3, and of 

 the species there belonging is most clearly allied to rivalis, which it re- 

 sembles in form and considerably in its markings. It is, however, more 

 shining and with the coarse punctuation of the upper surface very obvi^ 

 ous. The third tarsal joint is scarcely bilobed, the claw-joint rather long, 

 and the claws long and slender. 



I have seen but four specimens collected in Western Nevada. 



H. quadriiuacttlatus n. sp. — Broadly oval, feebly shining, piceous, head 

 centre of prothorax, two spots on each elytron orange yellow. Head alutaceous, 

 sparsely, finely punctured. Thorax piceous, a central transverse space pale, sides 

 feebly arcuate, hind angles rectangular, surface with coarse punctures along the 

 basal region, those in front gradually finer, between these a dense, very fine punc- 

 tuation, lateral impressions very vague. Elytra with distinctly alutaceous surface, 

 with numerous but not densely placed coarse punctures, which are gradually finer 

 to the apex and obsolete toward the sides. Presternum finely carinate between 

 the coxae, the prosternal process rather broad but not long. Body beneath dis- 

 tinctly alutaceous, subopaque, the sides of the coxal plates with very coarse punc- 

 tures. Ventral segments somewhat wrinkled at the sides. Length .12-. 14 inch; 

 3-3.5 millim. PL IX, fig. 5. 



This species is also referred to the rival is group, although its sculp- 

 ture and style of coloration recall Hydrovatus. The male has the ante- 

 rior tarsi a little more dilated than the female, the claws longer and 

 rather less arcuate. In both sexes the third joint is feebly emarginate 

 and the terminal joint moderately long. In the female the terminal ven- 

 tral segment is somewhat acuminate, in the male simple. 



The elytral spots are large, the humeral spot extends on the epipleura 

 and reaches nearly to the suture, its posterior border being broadly 

 notched. The posterior spot is about one-third from the tip, of irregular 

 quadrate shape, and also reaches the side margin of the elytra. The ex- 

 treme tip is often yellow also. 



Occurs in Western Nevada. 



I It I % It I II ISO V Maerk. 

 T. I^econtei Horn, Trans. Am. Ent. Soc. 1868, p. 131, has been described as 

 T. cedonulh Schaufuss, Ann. Ent. Soc. Fr. 1882, p. 43. 

 A second species occurs in Pennsylvania. 



T. peiiiisylvaiiiciim n. sp. — Oval, moderately robust, rufo-testaceous, 

 shining. Clypeus slightly prolonged and truncate, corneous. Head sparsely and 

 finely punctulate. Thorax narrower in front, sides moderately arcuate, disc very 

 sparsely and finely punctulate. Elytra wider at base than the thorax, disc striate, 

 striae with coarse closely placed punctures, intervals slightly convex, sparsely 



