CERAMBYCID^E 359 



These species differ from each other chiefly in general outline, 

 in the different form of the post basal elytral spot, in the apical 

 vestiture and modification of the elytral apices, the last being 

 rather distinctive in all of them; lorguini differs, in addition, by 

 the character of the pronotal sculpture, more depressed elytra and 

 very much heavier legs. Regalis Chev., differs in the much coarser 

 rugosity of the pronotum. The occasional subsuturally broken 

 ante-apical fascia is a vestigial character due to the former presence 

 of a subsutural carina, as in Cyllene; at present all trace of this has 

 disappeared but it is distinctly observable though very obtuse in 

 Glycobius. 



Calloides "nobilis var. mormonus" Schaeffer, (Journ. N. Y. Ent. 

 Soc., 1911, p. 124) belongs with the above described biformis, 

 muliebris, coloradensis group, but is larger than any of these species 

 (27 mm.) and, as the fasciae are said to be all of equal width, must 

 have much broader median and ante-apical fasciae. The form of the 

 elytral tips is not stated, but it differs from biformis in having the 

 median fascia below the middle; in biformis it is exactly at the 

 middle ; in muliebris it is a little below the middle as it is in nobilis, 

 but muliebris has a much smaller head and prothorax than in 

 biformis and more slender antennae, and the very peculiar elytral 

 tips are probably not duplicated in mormonus; so I believe mormonus 

 to be still another species and not identical with any here described. 



Xylotrechus Chev. 



This and the remaining genera of the above table differ from the 

 preceding in having the abdominal process acute and the elytra 

 without trace of the subsutural carina, thus indicating a distinct 

 section or group of the Clytids; the body also is more slender and 

 subcylindric as a rule. Removing planifrons Lee., as suggested 

 by Leng, the genus is clearly limited and easily recognized by the 

 bicarinate front. Fuscus, of Kirby, is by no means a synonym or 

 variety of undulatus but is a distinct species, having a suffused 

 pronotal tracery of pale hairs almost exactly like that of nauticus, 

 much shorter elytra and a system of fine and very irregular elytral 

 lines also much more closely resembling nauticus than undulatus; 

 it differs from nauticus in the parallel, subevenly rounded sides of 

 the prothorax; I have a pair in very good state of preservation 



