90 OTIOEHYXCIIID^E. [Horn. 



sion on each side near the hind angles ; surface coarsely punctured with 

 fine punctures intermixed, moderately densely scaly. Elytra wider at base 

 than the thorax, and three times as long, humeri slightly oblique, sides 

 parallel, apex slightly prolonged ; disc moderately convex finely striate, 

 strife moderatel}'^ coarsely punctured, intervals flat ; surface moderately 

 densely scaly, scales cinereous with a transverse fuscous spot on each elytron 

 slightly in front of the middle and another smaller near the declivity. 

 Body beneath moderately densely scaly ; legs densely scaly, sparsely pilose, 

 middle and hind femora with a fuscous spot near the tip. Body winged. 

 Length .36-52 inch ; 9-13 mm. 



var. laiitus. Elytra moderately densely scaly, scales cinereous, with 

 two fuscous spots on each elytron, the anterior slightly in front of the mid- 

 dle and formed of short lines of fuscous scales on the intervals 2 to 5 sur- 

 rounded with paler cinereous scales, a similar spot on the beginning of 

 the declivity composed of three short lines on intervals 2-3-4. 



««r. . Elytra uniformlj^ covered with nearly white scales 



moderatelj'^ densely placed. 



This species occurs in Arizona, and has been distributed under the un- 

 published name Brachythysus lautus. 



C. placidus, n. sp. 



Oblong, more slender than lautus. Head somewhat narrower, median 

 sulcus broader at middle. Thorax scarcely wider than long, gradually 

 narrower from base to apex, sides feebly arcuate ; apex obliquely truncate 

 slightly prolonged over the head, base bisinuate, hind angles slightly 

 laminiform ; disc with broad shallow median fovea, and a feeble impression 

 on each side near the base, surface sparsely punctured with finer punctures 

 intermixed, very densely scaly especially in the median fovea. Elytra 

 similar in form to lautus but rather longer in proportion to their width ; 

 disc moderately convex, finely striate, and with rather fine punctures rather 

 distantly placed ; surface very densely scaly. Body beneath very denselj-- 

 scaly and sparsely hairy. Legs densely scaly, tibife pilose. Length .48- 

 .52 inch; 12-13 mm. 



The two specimens before me, both females, vary in color. The larger is 

 pale greenish-white, the other simply white. The scales are so densely 

 placed as to entirely conceal the surface color. In this respect they differ 

 notably from the preceding species. The more striliing differences have 

 already been pointed out. 



Two specimens. Arizona. 



BRACHYSTYLUS Sch. 



BracTiystylus Schonh. Gen. Cure, viii, 2, p. 433. 



Rostrum horizontal, nearly as long and as broad as the head, deeply 

 emarginate at tip (with narrow smooth space) and at the sides, above flat 

 and with a fine median groove. Scrobes short, narrow in front, their lower 

 border suddenly flexed and directed downwards. Eyes round, moderately 

 prominent. Antennae short, scaly ; scape short, robust, obcouical, passing 



