BRUES: PARASITIC BYMENOPTERA. 99 



coriaceous or rugulose, without traces of any sutures. Short, only as long 

 as the thorax, elongate oval when seen from the side, the margin evenly rounded 

 at the tip when seen from the side and rather pointed when seen from above. 

 Wings hyaline, stigma large, light brown, venation almost effaced, but appar- 

 ently identical with that of recent representatives of the genus. 



Type.— No. 2342, M. C. Z., Florissant, Col. (No. 2077, S. H. 

 Scudder Coll.). Nos. 2343-2344, M. C. Z, Florissant, Col. (Nos. 

 1917 and 5236, S. H. Scudder Coll.) also belong to this species. The 

 Scudder Collection also contains two specimens (No. 11,404, M. C. Z., 

 No. 2345, and No. 13,815, M. C. Z., 234G) which I doubtfully refer to 

 this species. 



Agathidinae. 



Serres, ('29) has recorded Agathis from Aix in the Lower Oligocene, 

 and the Florissant beds have yielded the three species described below. 



Agathis Latreille. 



Key to the Florissant species of Agathis. 



1. Second cubital cell (areola) small, strongly narrow T ed above or 



triangular, species small, 3.5-5 mm. 2. 



Areola large, scarcely narrowed above, its upper side longer than 

 the first section of the radius, large species, 7 mm. 



A. saxatilis, sp. no v. 



2. Areola triangular, touching the radius in a point, the second 



transverse cubitus hyaline, indistinct . A. velatus, sp. nov. 



Areola with a distinct upper side, although this is much shorter 



than the first section of the radius, second transverse cubitus 



fully colored A. juvenilis, sp. nov. 



Agathis saxatilis, sp. nov. (Fig. 82.) 



Length 7 mm. Probably dark colored or black. Antennae black, rather 

 long and tapering, the joints near the base a little less than twice as long as 

 thick, those toward the apex much 

 smaller, but as long in proportion to 

 their width. Surface of head smooth 

 and polished. Thorax seen in dorsal 

 view likewise shining, the sutures cren- 

 ulate ; metanotum with traces of a more 

 or less distinct areolation. Abdomen Fig. 82.- Agathis saxatilis, sp. nov. 



somewhat lighter than the head and 



thorax, particularly at the base which was perhaps reddish or brownish in 



life. Wings apparently slightly infuscated, the veins very dark and heavy as 



