194 Dr. Brendel's Descriptions of New Pselapliidae. 



is punctulate, the grooves equal in size, the exterior ones connected by 

 dilated, slightly impressed sulcus. The abdomen has the two first seg- 

 ments overlapping the rest; the first segment is 4-spinous and 5-sinu- 

 ate, the emargination next to the parietal margin is the largest, the me- 

 dian notch the deepest, consequently the two median spines are very 

 long, acuminate ; the second segment is sinuous on each side, the hind 

 margin nearly rectilinear, with three impressions corresponding to the 

 three intermediate sinuses of the first segment. The posterior tibia? 

 are curved in the same manner as in all those species belonging to this 

 section. 



This is a male, the only specimen known, and was discovered near 

 Washington, D. C. by my friend Mr. Henry Ulke, to whose memory 

 I dedicate this valuable addition. 



Comparison of the females of Bryaxis abdominalis, floridana, in- 

 termedia, lllinoisensis, Ulkei, denfata and perforata. 



1. B. abdominalis : — Body convex, capital fovese smaller, not very deeply im- 

 pressed. The thoracical foveas smaller in comparison to the size of the thoraci- 

 cal disk, the basal sulcus faintly impressed near the middle. 



2. B. floridana: — Body depressed, elongated, smaller than abdominalis, capital 

 and thoracical grooves well impressed, except the frontal groove, which is ample 

 and very sightly impressed. The thoracical sulcus the same as in abdomi- 

 nalis. 



3. B. intermedia: — The supposed form of the 9 comes nearer to B. dentata, is 

 more convex than floridana, the frontal groove small, well impressed. 



4. B. Illinoiensis : — Smaller than B. dentata, the capital and thoracical grooves 

 ample, well impressed; the basal thoracical sulcus well impressed, nearly touch- 

 ing the intermediate groove. The thorax is more rounded than in the prece- 

 ding and in dentata. The whole stature favors more B. rubicunda than any of 

 this series. 



5. B. Ulkei: — The supposed form of the 9 favors most B. dentata. According 

 tn the % , the thorax is smaller in proportion, and the sides near the base are 

 more emarginate than in B. dentata. 



6. B. perforata: — The supposed form of the 9 must come near B. lllinoisen- 

 sis, but it is only one millimetre long, shining, black, somewhat depressed, the 

 anterior tibiae are not curved even in the % . 



7. B. dentata: — The stature is musculous, strong in comparison to the prece- 

 ding, convex, favors most a small specimen of abdominalis, the grooves are well 

 impressed, the basal thoracical sulcus is not very ample, but obvious and even 

 near the middle well impressed. The elytra are very visibly punctulate. 



8. B. clavata: — This and conjuneta are hardly to be confounded with the pre- 

 ceding. B. clavata is smaller, black, legs testaceous. 



9. B. conjuneta: — This differs in the 9 chiefly by the size and color. 



