290 MEMOIRS ON THE COLEOPTERA 



The locality of janthinum is erroneously given as "Texas" by 

 Mr. Leng (Bull. Bk., VII, p. 113). It is northern, like all other 

 species of the genus, and seems not to occur in the south; it is a 

 very peculiar species, not only in sculpture but in sexual characters 

 and is represented in my collections by two very dilapidated speci- 

 mens kindly communicated by Prof. James F. Kemp;* it appears 

 to be very rare; the elytra are singularly straight and parallel at 

 the sides and the surface more flattened than in any other species. 

 Cicatricosum Mann., is from Alaska and the Colorado examples 

 so identified by Leng (1. c.) belong to a very different species. 

 Hirtellum and vile of LeConte, are remarkable species either in 

 coloration, size or sculpture, and may not be strictly congeneric. 

 The greatest width given above for antennatum refers to the pro- 

 thorax and, for hesperum, to the elytra. JEreum Newm., if I have 

 correctly identified the species, is a true Phymatodes and not a 

 Callidium. 



Tribe CERAMBYCINI. 



Some of the characters b ought forward hitherto in an attempt 

 to define genera among the allies of Elaphidion, in the LeContean 

 group Cerambyci of this tribe, seem to be equivocal and of no real 

 value. For example, the carination of the outer antennal joints, 

 serving as the principal basis of the genus Aneflus, is quite as 

 evident in Hypermallus arizonensis and is even very much more 

 acute and distinct in Elaphidion irroratum; and the elongate patches 

 of dense sensitive antennal pubescence advanced as one of the chief 

 distinctive features of Romaleum, are quite as evident in Aneflus, 

 Hypermallus incertus and some other species, not associable with 

 Romaleum from any other viewpoint. Making use in some cases 

 of rather more general characters, involving the habitus of the 

 various species, and of some well defined structural modifications 

 of the antennal spines and elytral apex, I would suggest the following 

 scheme for the separation of the rather numerous genera: 



Spine of the third antennal joint very long and conspicuous 2 



Spine of the third joint short, sometimes becoming obsolete though then 

 represented by a sharply defined angle 3 



* Very recently Mr. Frost has generously sent me three very good specimens of 

 this species taken at Monmouth, Me. In one of these examples, a large female, the 

 color is pure blue with scarcely any violaceous reflection; in some other specimens 

 the elytra are strongly violaceous. 



