STAPHYLINID.E. 57 



lanceolate, lialf as broad at base as the tip of the last segnieut, bluntly 

 pointed, reaching as far as the lateral appendages, and similarly hirsute. 



I can find no modern species with which to compare this unless it be 

 the much slenderer P. tacJdniformis (Say), and even in this the prothorax is 

 much longer. 



Length, 9.5 mm.; breadth, 2.25 mm.; length of antennae, 1.75 mm.; of 

 prothorax, 1.2 mm.; breadth of same, 1.8 mm. 



Florissant, Colorado; three specimens, Nos. 491 and 7533, 3128, 

 13661. 



Named for the distinguished coleopterist, George H. Horn. 



Philonthus abavus sp. nov. 

 Pi. VII. tig. 3. 



This species is represented by several specimens, but none that are well 

 preserved. It is smaller than the others described and differs from them in 

 some few particulars, which can be determined. The head is rather small, 

 narrower than the prothorax, subquadrate and smooth, not narrowed poste- 

 riorly; the joints of the apical half of the antennae are entirely similar to 

 those of P. horni. The prothorax is broad and short, as in P. horni, broad- 

 est, however, posteriorly and narrowing throughout, as ordinarily in modern 

 species of this genus, smooth. The legs are as in P. marcidulus, but the 

 tibise are less heavily spined. The elytra are twice as long as the prothorax, 

 thinly and very delicately callous, slightly marginate at the suture. The 

 abdomen tapers gradually from the tip of the elytra to a bluntly rounded 

 apex and is sparsely villous. 



Length, 7.5 to 9 mm.; breadth, 2 mm. 



Florissant, Colorado; three specimens, Nos. 4791, 7466, and of the 

 Princeton College collection, 1.500. 



XANTHOLINUS Serville. 



A cosmopolitan genus with numerous species, of which above a dozen 

 are North American. Fossil species have been found at Aix, in amber, and 

 at Florissant, one in each. 



