57 



the lobes of the third. The antennae, which are very much 

 clubbed, are most remote from those of Enoplium on the one 

 hand, and from your 874 [874 Hentz's MSS. Catal. Priocera 

 undulata Say] on the other, all gradations between these three 

 appearing to exist. 



Latreille (Genera Crust, et Ins. Ill,) remarked the singular 

 armature of the mandible in the male of Uleiota flavipes. I 

 have several specimens resembling in form, size and structure 

 your 754 [754 Hentz's MSS. Catal. = Uleiota dubia FFabr.], but 

 agreeing entirely with Fabricius's description of the colors of 

 the dubia ; I therefore think yours must be merely a variety of 

 that species. The confusion made by Dumeril in respect to 

 this genus exists only in his plates ; for in the text (Consid. 

 gen., p. 192) he refers both to plate 17, fig. 7, and to pi. 7, fig. 

 3, for an example of his anomalous genus Oucujus, which is syn- 

 onymous with Uleiota of Latreille. His Omaloides contain 

 Lyctus, Colydium, Trogosita, Ips, 1 Mycetopliayus and Hetero- 

 eerus. I must have made some mistake in writing the name 

 Cucujus flavipes. The only insects of that genus that I know 

 are C. clavipes Oliv., of a beautiful lake color, and C. r.u/us 

 Oliv., the color of which is brownish rufous and smaller than 

 the former. 



The name of your 89 [89 Hentz's MSS. Cafal. = PhllontJms 

 flavolimbatus Harr. MSS.] (/Stapki/linus anthrax^) was given me 

 by Prof. Say, as an insect described by Gravenhorst. You 

 will receive the European ElapJirus riparius with the insects 

 from me, and can then decide whether it is really the same as 

 your and Prof. Say's American species. Having some years 

 since found a species of Buprestis upon the Cart/a porcina 

 which is inhabited by the larva, I affixed to it the name of 

 obscura? Fabr., but observed to you in a former letter, that I was 

 not certain whether the name was correctly applied. Indeed it 

 appears to be impossible to determine many of our numerous 



1 Dume'ril's Ips is a Cryptophagus of the modern systems, a pentamerous genus. 



