238 J. L. LECONTE, M. D. 



ropean species. It is easily known by the sexual characters, and the 

 finely but rather densely punctured dorsal segments. 



14. O. nanus, Er. Staph. 797.— 'J,. Seventh ventral feebly bisinuate at tip; 

 9> slightly triangularly produced, (Er.) 



One specimen, Carolina, Dr. Zimmermann. In this species the 

 head and thorax are less opake than in the next; the dorsal grooves 

 are deep, and the antennae are entirely black. It is a very small 

 insect, being only 1.2 mm; .05 inch long. 



15. O. exiguus, Er. Staph. 798; 0. pi/gmctus, Mels. Pr. Ac. Nat. Sc. Phil, 

 ii, 41. 



Middle and Southern States. The sexual characters are much as 

 in the preceding, and the size is about the same. The specimens in 

 my collection would seem to indicate one or two allied species, but the 

 material is not suflBcient to enable me to define them. The head and 

 prothorax are entirely opake, the dorsal grooves are wide and shallow, 

 and the base of the antennae is piceous. 



This and the preceding species differ remarkably from the others 

 by the front tibiae not being obliquely truncate or emarginate on the 

 outer side near the tip, but slender and truncate at tip. 0. jyarvuhis, 

 Mels. (i. c. supra), does not seem to difi'er from this species. 



PHL,<EOJVAEUS, Er. 



Although one species of this genus before it was properly defined 

 by Erichson,* had been separated by Stephens from Oxijtelus as a 

 distinct genus under the name Aplo(ferus, this separation had been 

 made upon the very unimportant character of the sculpture of the 

 prothorax. The latter, namely, in Fhloeonaeus has but two dorsal 

 grooves, while in most Oxyteli, as has been seen in the foregoing de- 

 scriptions, there are three. Yet as in some species the outer grooves 

 {pens^lvank-us), become feeble, and in others all three (incolamis, 

 plactcsi/ms), are obliterated, it is obvious that this character is of no 

 value for founding a genus, and the name proposed by Stephens not 

 having been adopted by Erichson, who had the right to make the 

 choice, must be considered as not published. 



But one species has yet occurred in our fauna : 



1*. linearis, Lee. (Ilaphderus), New Spec. Col. (Smithsonian 8vo), 54.— 

 The front libife are slender, entire, and truncate at tip, as in the European 

 P. coesus, with which it also* agrees in sexual characters. %. Seventh ventral 



«Kafer, Mark Braudeub. 597, 1837. 



