16 bulletin: museum of comparative zoology. 



apparently with five segments of approximately equal length, the first two 

 somewhat shorter. Wings hyaline, the veins brown. 



Fig. 8. — Protoibalia connexiva, gen. et sp. nov. Type. 



Type.— No. 2065, M. C. Z., Florissant, Col. (No. 13,514, S. H. 

 Scudder Coll.). Also the reverse, No. 2066 M. C. Z., Florissant, Col. 

 (No. 13897, S. H. Scudder Coll.). 



AGAONIDAE. 



The occurrence of what is undoubtedly a true fig insect among the 

 specimens from Florissant is one of the most interesting discoveries 

 which I have made. 



The presence of fossil fig trees in the Florissant flora is already 

 known, and the occurrence of a fig insect shows that they were undoubt- 

 edly then fertilized through the agency of Agaonidae just as they 

 are at the present day. 



Tetrapus mayri, sp. nov. (Fig. 9.) 



Female. Length 4 mm. Probably dark colored, although nearly all the 

 color indications are flaked off in the type. Head preserved in lateral view; 

 very long, proclinate, fully twice as long as thick. Antennae apparently 11- 

 jointed, rather stout, the scape short, pedicel small, flagellum not thickened 

 apically, first three joints about quadrate; following also apparently about 

 the same shape, the last probably longer. Thorax above and on the pleurae 

 coarsely sculptured, transversely rugose-striate, merely striate or aciculate on 

 the pleurae anteriorly. Thorax strongly arched above, the metathorax long, 

 with some transverse irregular areas anteriorly. Spiracles very large and 



