350 



REVISION OF THE TENEBKIONIDvE OF AMERICA, 



slightly longer than the head and thorax, slender and with the joints longer than broad. 

 The last three joints are scarcely thicker than those which precede, although compara 

 tively shorter, the third joint is one-and-a-half times the length of the fourth. The legs 

 are slender and longer than usual, the anterior tibia" slender and the tarsi dilated in the 

 males. 



M. augustus, Lee, (Blapstinus) Ann. Lye. V., p. 140. 



The thorax is sub-quadrate, the sides moderately rounded and broadest at middle;, the 

 anterior and posterior angles are not prominent, the surface feebly convex towards the 

 sides, flattened on the disc. The elytra are twice as long as broad at base, the base emar- 

 ginate, sides feebly rounded, apex obtuse. The elytra have regular stria; of fine punc- 

 tures, the interstices being flat and finely but sparsely pubescent. 



Length .26 inch. 



Found rather abundantly flying at night, at Fort Yuma, California. 



CONIBITJS, . Lee. 



Conibius, Lee., Ann. Lye. V., p. 145. 



Besides the antennal characters given in the table, this genus may be known from 

 Blapstinus by the small rounded superior portion of the eye;. The anterior tibise are also 

 broader, slightly more arcuate and finely denticulate on the outer edge. The tarsi of the 

 male are but feebly dilated. The antenna; are much more robust than in Blapstinus, the 

 third joint being, however, longer than the fourth and at least one-half longer than broad. 

 The metasternuin is short and the body apterous. 



Our species are three in number. 



Sides of thorax moderately rounded, hind angles obtuse;, base feebly sinuate. 



Thoracic margin feeble, equal. seriatus. 



Thoracic margin more distinct, slightly reflexed, broader behind. parallelus. 



Sides of thorax nearly parallel and straight, base more strongly sinuous, hind 



angles more distinct. 



el o n gatus. 



C. seriatus, Lee., Ann. Lye. V., 145. 



This species is more robust, broader and more convex than either of those; which fol- 

 low. The thorax is more strongly rounded on the sides, and convex from the margin. 

 The margin is very narrow and equal at apex and base;. The base of thorax is feebly 

 sinuate and the angles obtuse. The surface of the insect is also much less opaque and 

 punctured. • • 



Length .16 inch. 



Not abundant in the Colorado Desert of California. 



