488 SUBFAMILY X. CTJRCULIONINJE. 



Subtribe II. CRYPTORHYNCHI. 



Species varying- much in size and appearance but all agreeing 

 in having the front coxse separated, the beak lying between them 

 in repose, the pectoral groove distinctly limited behind; tarsal 

 claws simple, usually small. A new genus has been erected for 

 Acalles nuclialis Lee., and two genera founded by Casey and one 

 by Faust are also to be added to those recognized by LeConte and 

 Horn. Macromerus mcestus Lee., J. E. (1824, 171) based on one 

 specimen and not since recognized, has been dropped altogether. 

 Dr. Schwarz, from the description only, considers it a synonym 

 of Cry ptorhijii chits parochus Hbst. 



KEY TO EASTERN GENERA OF SUBTRIBE CRYPTORHYNCHI. 



a. Funicle of antennae 6-jointecl. 



b. Elytra with rectangular humeri; femora toothed; three middle 

 ventral segments subequal in length; surface densely clothed 

 with scales. VII. EUSCEPES. 



bb. Elytra oblong-oval with rounded humeri; femora unarmed; sur- 

 face usually nearly glabrous; second ventral segment longer than 

 third. 



c. Mesosternum with shallow emargination. VIII. TYLODERMA. 



cc. Mesosternum protuberant. IX. MICRALCINUS. 



aa. Funicle of antenna? 7-jointed. 



d. Thorax prolonged over the head. 



e. Scutellum invisible; tarsi moderately dilated, scarcely spongy 



beneath; second ventral segment longer than third and fourth 



combined. X. LEMBODES. 



ee. Scutellum visible; third joint of tarsi dilated and bilobed as 



usual; tibiae very short, not more than one-half as long as 



femora; second ventral segment long but not longer than 



third and fourth combined. XI. PARACAMPTUS. 



dd. Thorax not prolonged over the head. 



/. Club of antennae not annulated except near tip, solid or nearly so. 



g. Middle and hind tibiae rapidly increasing in width from base 



to middle, then abruptly narrowed, the apical half not wider 



than base; antennal club as long as the preceding five joints 



united; form oblong-oval, unevenly clothed with scales. 



XII. CANISTES, 



gg. Tibiae normal, slender; process between the hind femora tri- 

 angular; form pear-shaped, convex, thinly clothed with re- 

 clined bristles. XIII. EURHOPTUS. 

 -f-f. Club of antennae annulated as usual. 



h. Tibiae slightly spined at tip; ventral segments 2 4 subequal; 

 form usually broadly oval. XIV. PSEUDOMUS. 



hfi. Tibiae armed with a strong hook at tip. 



i. Second ventral segment much longer than third. 

 j. Episterna of the metasternum very small, usually invisible; 

 length rarely over 3.5 mm. XV. ACALLES. 



