12 ENTOMOLOGICAL NEWS. [January, 



nearer the middle, the frontal sulcus not reaching the occipital 

 foveae and having different forms of the antennae in the sexes. 



The only difference between Oropus and Rhexidius lies in the 

 possession of a minute spinous tubercle at the sides of the pro- 

 notum in a line with the lateral foveae. The length of the second 

 ventral segment, which ought to be measured at the sides, not in 

 the middle, where commonly intubation takes place, is larger, 

 but in length not much more than subequal to the third and 

 fourth ventrals; therefore Prorhexius is identical with Rhexidius. 



Now I will describe a new species of Rhexidius which makes 

 the difference between the other two genera very doubtful, and 

 perhaps brings them very near to Trogaster. 



Rhexidius trogasteroides n. sp. 



<3\ The forms of the several parts of the body is exactly like Oropus; 

 uniformly reddish brown. Length 1.66 mm. Head and prothorax granu- 

 lated (as in Rhexidius granulosus), elytra densely punctured, abdominal 

 dorsum nearly smooth. The head very transverse, though less so than 

 in R. granulosus, occiput triangularly impressed at its base, occipital 

 fovese large, near the eyes and in a line with the anterior part of the eyes; 

 the frontal ridge and the subjacent arcuated sulcus limited half way be- 

 tween foveae and the supra-antennal swelling, the sulcus ending in a deep 

 puncture just in front of the respective fovea (Trogaster). Antennae as 

 long as the head and half of the prothorax; joint i as thick as the width 

 of the eye, cylindrical, longer than wide; 2 globular, two-thirds as thick 

 as the first; 3 and 4 equal, rounded, somewhat transverse, much smaller; 

 5 projecting inside in form of a wedge, half as long outside, and three 

 times as wide as the fourth; 6 as wide as 5, inflated inside, here as long 

 as the first joint, and outside at the insertion as long as second; 7-10 

 gradually increasing in width, transverse, trapezoidal, together as long as 

 the second, third and fourth conjointed; 7 as wide as the second; the loth, 

 or the base of the last joint as wide as the first; n as long as the four 

 preceding, and beyond the middle more than twice as wide as the first 

 joint ( Trogaster). Palpi as in Oropus. Prothorax as in Rhexidius in 

 sculpture, but the median sulcus has a deeper place in the anterior third, 

 and the sides are rounded anterior to the line of the foveae, here sud- 

 denly forming a sharp edge with a very short emargination producing a 

 tubercle similar to Oropus, except that the tubercle is not as sharply 

 pointed. Elytra as in Oropus, with four basal punctures. and the respec- 

 tive lines, the third longer than the second, the fourth short and recurrent. 

 Abdomen as in Oropus, with the dorsal border punctured, the penultimate 

 ventral with a transverse impressed line; 9 unknown. 



Three specimens were discovered on Chestnut Ridge, Pa., by 

 P. Jerome Schmitt, who deserves great honor as a circumspect 

 entomologist. 



