COCKEUELL: fossil IIYMENOPTERA FEOM FLORISSANT. 61 



ill Tipliia ( 9 ) they are conspicuously longer tbtiu broad. In Geotiphia and 

 Tiphia the claws are bifid ; in Austrotipliia they appear at first sight to be 

 simple, because the inner tooth is flattened, shortened, and directed somewhat 

 inwards. In Tiphia the middle coxae are very widely separated by a bilobed 

 projection of the niesosternum ; in Austrotiphia they are considerably closer 

 together, the bilobed projection, although present, being much smaller. In 

 Engycystis they are more as in Austrotiphia. In Tiphia the middle tibiae 

 have only one s\->ut, in Austrotiphia and Engycystis (as in the Myzinids) 

 there are two. Tiphia has an open marginal cell and only two subniarginals ; 

 Austrotiphia, Engycystis, Geotiphia, and Lithotiphia have a closed marginal 

 and three submargiuals. 



'o'- 



Geotiphia, gen. nov. foxiana, sp. nov. 



Length about 11^ mm. ; black, witli liglit markings on abdomen ; femora black, 

 tibiae and tarsi light, probably red in life ; the abdominal markings, presumably 

 yellow in life, consist of a broad transverse spot or patch on the first segment, 

 rounded at sides and deeply emarginate posteriorly, a couple of transversely oval 

 spots on second segment, and a pair of smaller and rounder ones on third ; first 

 segment broad, broadly rounded in front ; widtli of abdomen about 3 mm. ; head 

 round, width about 2 mm. ; middle joints of flagellum about 180 n long and 

 225 broad ; middle tibia apparently short, broad (breadth about 300 /u), abruptly 

 truncate ; middle tarsi slender, first joint about 900 fi long, its outer edge straight 

 on first half and convex on second, third and fourth joints each about 225 fj. 

 long, and quite slender; claw joint (excluding claws) about 300 /x long; claws 

 bifid, the two teeth about equally long ; hind femora stout but not at all subglobose, 

 about 1500 /u long ; hind tibia about as long, about 600 fi broad ; basal joint of hind 

 tarsus about 250 fj. broad. Outer apical edge of hind tibiae with very broad teeth, 

 with points directed apicad, and long straight or nearly straight upper edges. Wings 

 with a large stigma (solid, filling stigmal cell), its breadth about 300 (this and all 

 following measurements in yu) ; costal cell very distinct, the costal and subcostal 

 nervures very heavy, and quite wide apart ; marginal cell complete, broadly 

 rounded at end, the actual apex not on costa, length of the cell 1500 fj., its tip sur- 

 passing apical point of third s. m. by about 100, although the distance from inser- 

 tion of third t. c. to apex of marginal is about 450 ; three submarginal cells, the first 

 1200 long ; second very broad, 450 long on marginal, and r'OO on cubital nervure, 

 receiving the first r. n. exactly at the middle; third s. m. 600 long on marginal, its 

 outer side strongly bulging ; first (upper) section of b. n. less than 300 long, bulg- 

 ing at its lower end, just before the origin of cubital nervure; second (lower) sec- 

 tion slightly over 300 long, meeting t. m., which is a little oblique ; first discoidal 

 1500 long ; second r. n. joining third s. m. not far from the middle. 



%;e. — No. 2021, Mus. Comp. Zool. Florissant, Col. (No. 14,292. S. H. 

 Scudder Coll.). Named after Mr. W. J. Fox, in recognitiou of his work on 

 Engycystis. 



