76 OTIORHYNCHID^E. 



[Horn. 



finely striate, striae not closely punctured, intervals flat, densely 

 covered with brown and paler scales intermixed, each interval with two 

 rows of not closely placed clavate scales. Body beneath and legs densely 

 covered with brownish scales, the legs with semi-erect broad, paler scales. 

 Length .14 inch ; 3.5 mm. 

 Occurs near the sea coast at San Diego, Cal. 



Rh. brevicollis, n. sp. 



Form oval, robust, densely covered with dark cinereous scales, and with 

 erect scales sparsely placed. Head and rostrum as long as the thorax, 

 densely scaly, with sparsely placed erect scales, and sparsely punctured. 

 Thorax more than twice as wide as long, apex truncate, base feebly, sides 

 strongly arcuate, disc moderately convex, sparsely punctured, densely 

 scaly, a broad madian space brownish, sides cinereous. Elytra broadly 

 oval, scarcely longer than wide, sides broadly arcuate, disc moderately 

 convex, finely striate, striae finely punctured, intervals flat, densely covered 

 with dark cinereous scales, each interval with a row of erect clavate scales. 

 Body beneath more sparsely scaly than above. Length .10 inch ; 2.5 mm. 



This species is much shorter and more robust than the preceding, ( the 

 scaly vestiture is paler, and the body beneath less densely covered. The 

 surface color when deprived of scales is pale castaneous. 



One specimen from Colorado. 



Group IV. TRACHYPHIXEI. 



Antennae moderate, scape attaining at most the margin of the thorax, 

 usually the posterior margin of the eyes ; funicle 7-jointed, joints 1-2 

 longer than the others, joints 3-7 moniliform; club short, oval. Claws free. 

 Although composed of species differing considerably in their general 

 aspect from those of the preceding group, no sharply-defined characters are 

 found by which to distinguish the two. The antennae are always less elon- 

 gate, the scape long, feebly arcuate and slightly thicker to the tip, attains 

 the thorax ; the funicle not longer than the scape, has the outer joints 

 short, round and moniliform. 



The following genera occur in our fauna : 

 Metathoracic side pieces entirely concealed ; eyes 



with distinct orbital groove. 

 Scrobes superior, very short and deep not reach- 

 ing the eyes ; anterior and middle tibiae 



feebly mucronate CERCOPEUS. 



Scrobes lateral, long, passing directly backwards 

 and enclosing the eyes ; tibiae strongly mu- 

 cronate CHJETECHUS. 



Metathoracic side pieces visible ; suture at least 

 moderately distinct. 

 Eyes with distinct orbital groove ; rostrum 



deeply transversely impressed at base.. ..TRACHYPHLCEUS. 



