57 



the lobes of the tliird. The antennas, which are very much 

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

 hand, and from your 874 [874 Hentz's mss. Catal. ^:= Priocera 

 ti7idulata 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 Jlavijjes. I 

 have several specimens resembling in form, size and structure 

 your 754 [754Hentz's mss. Catal.= Uleiota duhia ? ¥i\h\\~\^ but 

 agreeing entirely with Fabricius's description of the colors of 

 the duhia ; 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 Cucnjus, which is syn- 

 onymous with Uleiota of Latreille. His Omaloide^ contain 

 Lyctus, Colydmm, Trogosita^ Ips,^ Myeetophagus and Hetero- 

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

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

 are O. davipes Oliv., of a beautiful lake color, and C. rvfus 

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

 the former. 



The name of your 89 [89 Hentz's mss. Catal. = Philontlius 

 jiavolimhatus Harr. mss.] (^jStaphyUnus aiitJirax) was given me 

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

 will receive the European JElaphrus 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 Carya porcina 

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

 ohscura? 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 Dura^ril's Ips is a Cryptophagus of the modern systems, a pentamerous genus. 



