638 PROCEEDINGS OF THE ACADEMY OF [DeC, 



eyes prominent. Thorax long and narrow, the parts indistinct, but 

 there is a cordiform metathoracie area or depression, and just in front 

 of this a transverse series of little ridges or pleats, presumably on the 

 postscutellum (compare Macroteleia) . Hind femora unusually stout. 

 Wings with a very well developed submarginal vein, but no marginal 

 at all; stigmal vein short but distinct, ending in a round knob; 

 postmarginal vein long; a shadowy oblique vein going from the 

 postmarginal toward the stigmal knob, as in Chromoteleia. 



Palseoteleia oxyura n. sp. 



Length nearly 7 mm.; anterior wing nearly 4 mm., the stigmatal 

 knob 2.25 from base. Elongate, narrow, black, antennae and legs 

 ferruginous; thorax narrow, about .75 mm. in length anterior to 

 wings; abdomen narrow and tapering, sessile, rather broad at base, 

 its length a little over 4.5 mm., its width a very little over 1 mm.; 

 thorax same width as abdomen. Wings ample, clear, faintly reddish, 

 with a small ferruginous cloud in stigmatal region. 



The following measurements are in microns: length of post- 

 marginal vein, about 640; length of stigmal vein, including knob, 

 256, without knob, 192; diameter of flagellum, 128; width of hind 

 femur, 352; length of hind tibia, about 1,120. 



Miocene shales of Florissant, Wilson Ranch {Wickham). 



This is fully as specialized as the modern genera. 



Polistes kirbyanus u. sp. 



Osmia kirhyana Heer MS. 

 Stout bodied, with rather short abdomen, the basal two segments 

 of which are pallid and the other parts dark brown. Wings ample, 

 dusky. Length of body 13 mm., of wings about 11 mm.; first 

 discoidal cell almost 5.5 mm. long. Most of the venation of the 

 anterior wings can be made out, showing that it is nearly normal for 

 Polistes, except that the first t.c, instead of being straight, has a 

 double curve like the second. The third s.m. is much broader above 

 than the second. As in Polistes, the b.n. goes basad of t.m.; the 

 second s.m. receives both recurrent nervures (the cell is very broad, 

 broader than in modern Polistes); the first discoidal cell is very 

 oblique at end; the marginal cell has an elongated triangular form. 

 The great width of the second s.m. and the long very oblique apical 

 end of the first discoidal agree better with Monobia (M. quadridens L., 

 Rito de los Friioles, New Mexico, W. W. Rohhins; det. Rohwer) 

 than with Polistes. On the other hand, the third s.m. agrees with 

 Polistes, not with Monobia. 



