1892.] ENTOMOLOGICAL NEWS. II 



and thorax above clothed with short, erect, fuscous hairs; the clypeus, 

 face, cheeks and thorax beneath with silvery pubescence. Length 9 10 

 mm. 



cf . Differs from the female as follows: joints five and six of the an- 

 tennas roundly emarginate beneath, the seventh joint slightly so; the third 

 antennal joint very slightly, if any, longer than the fourth; the metanotum 

 with eight or nine strong ridges, which extend from the base to the trans- 

 verse ridge; wings darker along the costa. Abdomen strongly punctured, 

 the punctures closer than in the female, the first segment, except the base 

 and apex, and a transverse fascia on segments 2-5 above, reddish brown, 

 the fascia on the third segment narrowest; beneath the abdomen is fun-h- 

 and rather closely punctured. Length 9 mm. 



Described from two females and one male specimens. Col- 

 lected by Mr. Chas. W. Johnson, in Florida, in the vicinity of 

 St. Augustine. 



(To be continued.) 



-o- 



RHEXIDIUS. 



BY EMIL BRENDEL, M. D. 



This genus belongs to the second group of the tribe Trichonyni 

 according to the arrangement of Mr. Achille Raffray, the first 

 group having the posterior coxse distant and the first ventral seg- 

 ment large, including the genera Trichonyx and Amauronyx, 

 while the remaining genera, or the second group, have the pos- 

 terior coxse contiguous, or nearly so, and ( the first ventral seg- 

 ment very short, in some hardly visible. Among the latter group 

 my attention is called to the genera Trogastcr, Rhexidius, Oropns 

 and Prorhexiics. 



Trogaster is characterized by having the first ventral segment 

 visible (according to Mr. Raffray), while in the others it is said 

 to be invisible, except as a button between the coxae. But this, 

 according to my investigation, does not apply to Rhexidius and 

 Oropus, on which, by lifting the femur it can be traced to tin- 

 sides of the abdomen, where it is even more vnsible than in tin- 

 middle. Thus the difference between the four genera is ratlin- 

 inconspicuous. 



With the genus Trogastcr I am not acquainted, but by the 

 description of Dr. D. Sharp, it should have an analogous I'.uni 

 with Oropus and Rhexidius, and Capt. Casey indicated to in< 

 the differences: the pronotum having the lateral spinou^ tul. 



