48 COLEOPTERA RHYNCHOPHORA. 



the tibiae and tarsi are not ferruginous, at least in mature 

 specimens, and the size is much too small. I have as yet 

 seen nothing that fairly fits Mannerheim's description, and 

 should be glad to hear from any collector who believes he 

 has a good brjinnipefinis. 



A. melaucholicus Dietz. 



I have scarcely a particle of hesitation in pronouncing this 

 and murhius of the squamosus group identical. Melancholicus 

 is truly a squamose species and should be transferred to the 

 sqtiarnosus group, replacing there the name murimis which 

 becomes a synonym. I am unable to detect an appreciable 

 tooth on the middle thighs in melancholiais, in fact, in this 

 and all other respects they appear to agree, comparison being 

 made between the two types, which are both 9 's. There is 

 a second example of melaiicholiais — a cf, and with the 9 type 

 of niurinus are two other examples which are probably not 

 identical, one from Texas, the other from California (not 

 Colorado). 



A. sulcifroiis Lee. 



This cannot be separated from musculus Say. It is not black 

 as LeConte describes, but pitchy brown, the elytra at least 

 very plainly so. I do not consider the form of the frontal 

 fovea to be of much significance. It varies much in depth 

 and distinctness and tends to become elongate in some indi- 

 viduals when normally more or less punctiform. The narrow 

 impressed line in the type of sulcifrons is probably accidental, 

 as none of the other three placed in the series by Dietz have 

 it — these at least would all make good mttsculus. 



A. sexguttata Dietz. 



Dietz says the front is sulcate in this species ; I found the 

 fovea approximately punctiform in all the specimens of his 

 series that I examined. 



A. albopilosus Dietz. 



I cannot remember whether any one has called attention 

 to the small tooth on the inner edge near the apex of the 

 hind tibiae in the c? of this species. The character is a 

 unique one. 



