AMERICAN COLKOPTERA. 409 



and coai-sely punctured in the female; jiectoral sulcus extending upon the nieta- 

 sternum; underside with the exception of the first two ventral segnient^s rather 

 densely punctured ; tihiie flattened, anterior and middle sabangulate, posterior 

 rounded near the base, middle and posterior eniarginate above the apex, tarsi 

 stout, densely pilose, nuderneath with fulvous scales, third joint broadly bilobed, 

 fourth short, scarcely longer than the third, claws with a rather short tooth. 

 Length '2.:ir)-2.5 mm.; 0.09 0.10 inch. 



Hdb. — Canada, Pennsylvania, Utah (Texas; Lake Sup., Lee). 



Described by LeCoute as C. cruralis. Agrees in all j»articulai-s 

 with well authenticated specimens from various localities in Europe 

 in my collections. This species has the third ventral segment less 

 narrowed at the sides than in any other. The fifth ventral segment 

 has a fovea-like im[)ression in both sexes. A specimen in my col- 

 lection has the cruciform scutellar spot replaced by a sim})le basal 

 spot as in Rhirwncus ; it does not differ otherwise. The lateral spots 

 on the elytra are obsolete in some specimens. 



Group II. 



The few species constituting this group do not differ in general 

 habitus from those of the first. The metasternum is not excavate 

 for the reception of the apex of the beak ; the elytra are without 

 obvious asperities. 



But two species belong here, which are distinguished as follows : 



Larger, metasternum with an acute, transverse ridge, scales unicolorons, white. 



iiasalis. 

 Smaller, metasternum flattened, scales brownish, mottled with white. 



nebuIoi^iiM. 



A. nasalis Lee. — Oval, black, antennae and legs i)iceous. scaly vestiture 

 sparse, scales on upper surface very small, hair-like, intermixed with larger, oval 

 scales. Beak not quite as long as the prothorax ( J), curved, slightly subangu- 

 late above, flattened, tricarinate and i)unctured in its basal half, ta])ering and 

 glabrous toward the apex, scrobes expanded posteriorly, forming somewhat of a 

 sulcus before the upper part of the eye ; antennse slender, inserted at the middle, 

 funicle 7-jointed, joints 1-4 elongate, first joint robust, second joint longer than 

 the others, outer joints scarcely wider, dub oval-elliptic, acuminate. Eyes 

 slightly convex, only partially covered in repose, without suj)erciliary ridges. 

 Head densely punctured, front flattened ; prothorax one-half wider than long, 

 rounded on the sides, distinctly constricted at the apex, ocular lobes almost obso- 

 lete, anterior margin not emarginate, lateral tubercles acute, a spot of condensed 

 scales in front of each, doi-sal channel wide, deeply impressed at the base, nar- 

 rowed and becoming evanescent in front, disc closely and coarsely punctured, 

 especially towards the base; scutel distinct, elytra one-tliird wider at the base 

 than the prothorax, longer than wide, feebly rounded on the sides and distinctly 

 narrowed toward the apex, strise deep, as wide as the interspaces, punctures dis- 

 tinct, rather large and not closely placed, interspaces convex, transversely rugose, 



TKANS. AM. KNT. SOt:. XXIII. (52) NOVKMBKK, 1896 



