240 Mr. J. O. Westwood’s Descriptions 
Euparia nigricans, Westw. N.Sp. (Pl. XVII. fig. 4.) 
E. piceo-nigra, capitis parte antica tarsisque rufescentibus, 
pronoti angulis anticis porrectis, posticis latioribus rotunda- 
tis, angulisque humeralibus elytrorum acute porrectis. 
Long. corp. lin. 23. 
Habitat 2 
In Mus. Dupont, Parisiis. 
This insect, in the form of the head and the produced anterior 
angles of the elytra, resembles the preceding species, but the form 
of the prothorax is very different, being considerably narrower 
before than behind, with the fore angles porrected and rounded, 
the hind angles rounded off, and the disk covered with large deep 
punctures, and the margins setose. Each elytron is marked with 
eight rows of deeply impressed striz. The scutellum is elongate, 
triangular. The anterior tibiz are tridentate, and the hind ones 
slender, but dilated at the tips. 
I regret that Iam not able to give the locality of this species, 
M. Dupont having sent me the insect with no other indication than 
was afforded by a bit of green paper attached to it. As Ento- 
mologists can never be universally brought to agree upon the 
employment of particular coloured labels for particular geographi- 
cal districts, and moreover as such a plan, even if adopted, would 
still require the indication of more precise localities, now that the 
geographical range of insects has become so much more important 
an element in entomological science than it has until lately been 
deemed, J cannot but strongly object to the employment of any 
other mode of indication of localities than that of their absolute 
name upon tickets attached to the specimens. 
Pl. XVII. fic. 4. Euparia nigricans; 4a, meso- and meta-sterna. 
Ryrarus, Guérin, ined. 
This genus has hitherto remained undescribed, being, I believe, 
only indicated by name in Dejean’s “ Catalogue des Coléoptéres.” 
An unique specimen, received by Mr. Hope from M. Guérin 
himself, has been kindly lent me for examination, and I now beg 
leave to offer the following description and accompanying figure 
of this interesting insect to the Entomological Society. 
Caput magnum, supra fere planum, angulis lateralibus ante 
oculos parum prominentibus. Antenne 9-articulate. Mazx- 
ille ut in Aphodio formate. Mentum transverso-quadratum, 
antice valde setosum, Labium e lobis duobus membranaceis 
