Dr. Brendcl's Descriptions of New Pselaphidse. 191 



ters, arc appendicular with small seta). The second palpal joint seems 

 to be pedunculate, the third rounded, appendiculate, the fourth the 

 largest, oval, not transverse, appendiculate. The head is broadest 

 across the eves, with two grooves before and between the eyes and two 

 small punctures near the base of the occiput ; the front is much elon- 

 gated, split or sulcate in the middle and notched laterally behind the 

 insertion of the antennae. The antennae are half as long as the 

 body, the first joint emarginate at the base, obconical, and obliquely 

 truncate at the end, the two following ones are more or less oblong, 

 the 4th — 8th are equal, rounded, nearly transverse, shorter than long, 

 the 9th and 10th are equal, little larger than the preceding, the 11th 

 is not thicker but more oblong. The thorax is rounded, obcordate, 

 with the usual three impressions near the base, common to all Ctenis- 

 tes. The elytra are broader than in other Ctenistes and somewhat 

 more convex. The abdomen presents nothing unusual. The posterior 

 tibia) are dilated behind the middle ; the second joint of the tarsi is 

 rather intlated, thicker than usual. The ventral parts are entirely 

 those of Ctenistes. The specimen before me is undoubtedly a male. 

 It is still doubtful] whether it is not a new genus, which will only be 

 apparent by sacrificing a specimen for dissection. 



This insect was kindly presented to me by Mr. Henry Ulke, who found 

 two specimens near Washington City. 



3. Bryaxis intermedia is another elimatical variety of B. abdominalis, taking 

 range between the true B. abdominalis and B. floridana. Long. 1.9 m. m. 



It will be only necessary to describe the abdominal dorsal segments, 

 as it agrees in all other respects with B. abdominalis and B. jiori- 

 dana. 



The first segment presents those cakes of B. abdominalis deminutif, 

 leaving as large an excavation between them as in B. floridana.; the 

 second segment is but little emarginate in the middle, so that it pre- 

 sents only one lobe, the spaces each side of the median line are con- 

 cave, while the middle part is elevated from behind the usual punctur- 

 ed groove near the base down to that slight emargiuation on the tip ; 

 the third segment is entire, one-lobed and overhanging the rest of the 

 segments.* 



* I do not regard all those as the present species and B. floridana as 

 strictly true species, but as elimatical abberrations of the most extreme 

 form, that of B. abdominalis. Both B. abdominalis and floridana are truly ma- 

 ratime. There was till now none of them found in inland countries, while II- 

 linoiensis, which could perhaps with more right be regarded as a true species, 



