TUir.IC XXI. CKVI'TORIIVXCIIIXI. 405 



Our representatives of this tribe, while fairly numerous, are 

 insignificant compared with those occurring to the south of onr 

 territory, and from their diverse character are difficult to arrange 

 lineally. Onr arrangement, which does not profess to show re- 

 lationships, aims to draw together for the convenience of the 

 student of onr fauna alone, first, the forms with prominent 

 hnmeri, second, those that are glabrous or nearly so, third, a 

 number of heterogeneous forms with characters alien to the bulk 

 of the tribe, finally the true Cryptorhynchus- and . lra//r*-like 

 forms which are regarded as the typical members of the tribe. 

 We follow LeConte in recognizing but two subtribes as the di- 

 vision of the second by various recent authors is quite unsatis- 

 factory, their Tylodini being a heterogeneous assemblage united 

 only by characters pertaining to the metasternum that are diffi- 

 cult to observe. If any division is made it must extend beyond 

 (wo, and would finally result in exalting many of the genera to 

 subtribal rank. The tribe has not been recently monographed 

 by any American author, and the literature pertaining to our 

 species is widely scattered. 



KEY TO SflM'IMRES OF CRYPTORHYNCHINI. 



a. Pectoral groove confined to the prosternum (except in Pliyrdeinis), 

 open behind; elytra suddenly wider than thorax, their humeri prom- 

 inent; femora usually toothed beneath. Subtribe I. ITIIYPORI, p. 4G5. 

 off. Pectoral groove extending behind the front coxae into the mesoster- 

 num, sharply limited behind; elytra oval, never with prominent 

 humeri (Gersttrckeria is prominent behind the humeri. 1 



Subtribe II. CBYPTORHYXCHI, p. 488. 



Subtribe I. ITIIYPORI. 



The members of this subtribe have the eyes coarsely granu- 

 lated ; thorax usually smaller than in the other group and very 

 coarsely sculptured ; femora toothed beneath except in Phyrdenus 

 and MicroJii/its. Mlcrulc'imix, usually placed in this subtribe, 

 has been removed to subtribe II, near Ti/loclcniifi, which it resem- 

 bles in fades, if not indeed identical therewith. P1ii/r<lcnus, not- 

 withstanding the deej) excavation of the mesosternum and simple 

 feiiiora, has been added to this subtribe on account of its prom- 

 inent humeri and resemblance to Conotraclielus. Its feebly 

 spined tibial apex makes it exceptional wherever placed, and we 

 prefer to assist the student as far as possible fy associating 

 forms of similar facies. Following Casey, the genus 

 Lee. is transferred to the tribe Barini. 



