BRUES: PARASITIC HYMENOPTERA. 



17 



prominent, oval. Abdomen only two-thirds as long as the thorax, seen later- 

 ally it is suddenly truncate apically (the tip missing ?). Ovipositor exserted, 

 but broken away near the base in the type. Anterior and posterior legs very 

 strong and swollen, their 

 coxae large, triquetrous. 

 Middle legs small or wanting, 

 at least not indicated in the 

 specimen, although the ante- 

 rior and posterior pairs are 

 very well preserved and quite 

 prominent. Wings hyaline, 

 venation not distinguishable. 



Fig. 9. — Tetrapus mayri, sp. nov. Type. 



Described from one 

 specimen. 



Type.— No. 2067, M. 

 C. Z., Florissant, Col. 

 (No. 13,976, S. H. Scudder 

 Coll.). It is not very well 

 preserved in certain parts, 

 but most interesting as the 



only known fossil belonging to the group of fig insects. It is also a 

 representative of a family at present confined to the tropical and 

 semitropical regions of both hemispheres, and thus shows a distinct 

 southern element in the Florissant insect fauna. 



The genus Tetrapus Mayr to which I have referred it occurs at the 

 present time in Brazil where it is represented by a single species, T. 

 americanus, described by the late Dr. Gustav Mayr, a well-known 

 authority on fig insects in whose memory I take a very great pleasure 

 in dedicating the fossil form. 



TOYRMIDAE. 



The presence of a species of Torymus in the Middle Oligocene of 

 Brunstatt in Alsatia has been noted by Forster ('91), but no other 

 fossil members of this family have been previously made knowm. The 

 Florissant material contains three genera, one of them new, represent- 

 ing in all six species. 



Torymus sackeni, sp. nov. (Fig. 10.) 



Female. Length 9 mm. Ovipositor nearly as long as the body. Stout, 

 robust, black, the abdomen brownish or reddish yellow. Head finely striated, 



