24 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 82 



PSEN (MIMUMESA) BERMUDENSIS, new species 



Male and female. — Similar in structure and general coloration to 

 longicornis and striatus^ differing essentially only as indicated in the 

 key. The pygidium of this and the next species above is shining, 

 almost without shagreening, broader than in the niger group but not 

 so broad as in canadensis, and has numerous large piliferous punc- 

 tures, which are rather more dense along the sides than in niger, but 

 not so much segregated into lateral series as in that species. The 

 petiole of the abdomen is very similar in all three species, with a 

 dorsocentral carina which is sulcate on practically its entire length, 

 the length of the petiole being at least equal to that of the hind 

 trochanter and femur combined. 



Length, 7-8 mm. 



Type (U.S.N.M. No. 44211), male, allotype, and three male para- 

 types, from Bermuda, West Indies, May 3, 1909 (F. M. Jones) ; 2 

 female and 1 male paratype, Spanish Point, Bermuda, July 5, 1910 

 (K. Spalth). 



PSEN (MIMUMESA) CLYPEATUS Fox 



Plate 1, Figures 7, 8 

 Psen clypeatus Fox, Trans. Ainer. Eut. Soc, vol. 25, p. 15, 1898. 



A rather aberrant species in this subgenus, being the only one in 

 which there is any distinct red color on the abdomen, and having the 

 pygidium of the female similar to that of canadensis. 



The head behind the ocelli is microscopically transversely punc- 

 tato-striate, the mesonotum has a large part of the disk with rather 

 deep punctures, which are in part situated in slight striae, and the 

 petiole of the abdomen has a distinct tapered dorsocentral carina, 

 which is shallowly sulcate. The female has the pygidium of the same 

 form as in caiiadensis, which incidentally is the typical form in the 

 next subgenus. The petiole is about as long as the hind femur. 



Length, 6-7.5 mm. 



Originally described from Nevada and Colorado. Before me there 

 are specimens from the following localities: Colorado, compared 

 with type by Rohwer ; mouth of Bear River, Utah ; Redlands, Calif. ; 

 and California without other data. One female taken from the 

 stomach of a toad from California shows the two submedian apical 

 teeth of the clypeus more distinctly than usual. 



A remarkable specimen in which the petiole of the abdomen is very 

 short, flat above, with divergent striae on that surface, and widened 

 apically, is apparently an abnormality, as there is a rather deep im- 

 pression on the first tergite, which indicates that some injury has 

 affected it in the pupal stage. This specimen is from the mouth of 

 Bear River, Utah (Wetmore). 



