COCKERELL: FOSSIL HYMENOPTEKA FROM FLORISSANT. 55 



by me. It gives one the impression, at first, of a large Scoliid, but it is 

 unquestionably a member of the Vespidae. 



Palaeovespa scudderi, sp. nov. 



Length of anterior wing about 13 mm. ; of head, including mandibles, 6 ; of 

 thorax, 8 ; of middle femur and trochanter 4£ ; of middle tibia and tarsus, 7 ; of 

 first discoidal cell, 7; of marginal cell, which ends in a sharp point on costa, 3f ; 

 eyes deeply emarginate, as usual in Vespa, but contrary to what obtains in the 

 modern species, the part of the eye above the emargination is almost if not quite 

 as large as that below it ; mandibles shaped as usual in the genus ; the large lateral 

 lobes of prothorax are strongly vertically striate, the striation resembling that 

 found in the same region in species of Myzine and Ammophila ; pleura without 

 such striation ; head and thorax, dark, doubtless black in life ; the middle leg seems 

 to have been black as far as the beginning of the apical third of the femur, or there- 

 abouts, and beyond that yellow or red ; apex of first discoidal cell about as in 

 modern Vespa, but narrow ; marginal cell much more pointed than in the modern 

 forms, but venation otherwise normal ; abdomen missing. Lateral ocellus about 

 270 /a broad, and 300 from eye ; width of marginal cell about 900 /a ; of oblique 

 nervure terminating first discoidal, 225 /x. 



Type. — No. 2027, Mus. Comp. Zool. Florissant, Col. (No. 9065, S. H. 

 Scudder Coll.). 



No. 7738, S. H. Scudder Coll., badly preserved, appears to be a second 

 example of P. scudderi, as it shows well the striation of the prothoracic lobes ; 

 a feature which is not to be seen in any of the specimens of P. gillettei, though it 

 may not really be absent. This specimen has the abdomen, and indicates that 

 P. scudderi was about 18 mm. long. The hind margins of the last two abdom- 

 inal segments were broadly light (probably also the two before these), and the 

 light color (no doubt yellow in life) sent a rounded lobe upwards on each side 

 of the last segment, these markings being of the same type as in modern Vespa. 

 The antennae are normal. 



Palaeovespa gillettei, sp. nov. 



Length about 14£ mm. ; of anterior wing about 10 mm., with the nervures more 

 delicate than those of P. scudderi; breadth between wings slightly over 4 mm., of 

 abdomen 5 ; black, with indications on the mesothorax of what appear to have 

 been two longitudinal yellow stripes ; venation as in P. scudderi, with the same 

 sharply pointed marginal cell ; length of first discoidal a little over 5 mm. ; width 

 of marginal cell 000/t. The abdomen is not so broad basally as in modern Vespa ; 

 it is nearly parallel-sided, with the broadest part beyond the middle. The species 

 is allied to P. scudderi, but smaller in every way, with more delicate venation. 



Type. — No. 2028, Mus. Comp. Zool. Florissant, Col. (No. 16,325, S. H. 

 Scudder Coll.). No. 2029, M. C. Z. (No. 11,920, S. H. Scudder Coll.), No. 

 5986, S. H. Scudder Coll., and No. 2030, M. C. Z. (No. 14,305, S. H. 

 Scudder Coll.,) are also Palaeovespa, and presumably the present species, but 

 they do not show the venation so well. The first two show very distinctly 



