56 



BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



two light lines or narrow "bars on mesotborax, not reaching the anterior or 

 posterior margins, and 5986 also shows a narrow light anterolateral margin, 

 probably really on the prothorax, as is common in living forms. The antennae 

 appear to be as in Vespa. Nos. 2031, 2032, M. C. Z. (Nos. 18,382 and 7868, 

 S. H. Scudder Coll.), are two isolated anterior wings of Palaeo vespa. They 

 exhibit a good deal of difference in small details, but are, I think, certainly 

 referable to P. gillettei. From them it is possible to ascertain several characters 

 not clearly discernible in the type. Both show a dark cloud in the apical 

 part of the costal cell, such as occurs in modern Vespa. The junction of b. n. 

 to subcostal, which in the type is some 450 p from base of stigma, is only about 

 300 from it in No. 18,362, and 345 in No. 8981, but it is difficult to say exactly 

 where the basal n. leaves off, and where the stigma begins, the fusion being 

 gradual. The size is throughout too small for P. scudderi. The following 

 measurements are in /x : 



Length of second s. m. Length of third s. m. 



on marginal. on marginal. 



P. scudderi, Type No. 2027, M. C. Z. 450 825 



No. 2032, M. C. Z. 345 675 



No. 2031, M. C. Z. 225 675 



' 



P. scudderi, Type No. 2027, M. C .Z. 

 P. gillettei, Type No. 2023, M. G. Z. 

 No. 2032, M. C. Z. 

 No. 2031, M. C Z. 



Vespa (modern) 



P. gillettei is named after Professor C. P. Gillette, in recognition of his 

 work on the entomology of Colorado. 



EUMENIDAE. 



Odynerus palaeophilus, sp. nov. 



9 Rather slender, length 9 mm., anterior wing 8 mm. ; black, the wings dusky ; 

 first abdominal segment in lateral profile (i. e. seen from the side) presenting a 

 curve which is uniform, not abruptly bent at any point, and is equal to about 

 a quarter of a circle ; abdomen broad and convex, with the apical part separated, 

 doubtless originally marked off by a suture, as in some living forms ; marginal 

 cell very broad, in the form of an elongated triangle, the apex downwards; apex 

 of first discoidai only moderately oblique (much less so than in a modern species 

 compared) ; second submarginal cell narrowed almost to a point above, its length 

 on marginal being only 60 /a, while its length on cubital nervure is 555 fx ; width of 

 marginal cell, 600 p; width of third s. m. on marginal, 525 /*. It would be easy to 

 misinterpret the venation of this insect (as also of the species of Palaeovespa), 

 owing to the folding; but it is easily understood when compared with modern 



