57 



the lobes of tJie third. The antennae, whicli are very much 

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

 hand, and from your 874 [874 Hentz's m^s. Cuml ^ 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 flavipel I 

 have several specimens resembling in form, size and structure, 

 your 754 [754 Hentz's mss. Catal.= Uleiota duhia .?Fabr.], but 

 agreeing entirely with Fabricius's description of the colors of 

 riie duhia ; I therefore think yours must be merely a variety of 

 that species. The confusion made by Dumeril hi 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 Cucujus, which is syn- 

 onymous with Uleiota of Latreille. His Omalo ides * contain 

 lA/ctus, Colydium, Trogosita, Ips,^ Mycetopliagus and Hetero- 

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

 Cucvjiis flavi^jes. The only insects of that genus that I know 

 are C. clavipes Oliv., of a beautiful lake color, and C. rufus 

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

 the former. 



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

 fiavolimhatus Harr. mss.] {Staphylinus anthrax) was given me 

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

 will receive the European Elaphrus riparim 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 

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

 not certain whether the name was correctly applied. Indeed it 

 appears to be impossible to determine many of our numerous 



I Duraf^ril's Ips is a Cnjptophagm of the modoni systems, :i pentamerous genus. 



