28 bulletin: museum of comparative zoology. 



tip and nearly as long as the marginal. Postmarginal strongly developed, 

 one and two-thirds times as long as the marginal. Ovipositor not or but little 

 exserted. 



Two specimens, one of them with reverse. Type and its reverse 

 Nos. A57 and A55 from Station 13; A34 from Station 17, in the Amer. 

 Alius. Nat. Hist. 



Although not very well preserved this appears to be a common 

 species and deserving of a name. There are a number of other speci- 

 mens which are quite probably the same, but such minute fossils are 

 very difficult of specific association. The term Pteromalus is used 

 in the wide sense. 



MYMARIDAE. 



This family is abundantly represented both in Amber and Copal, 

 but has not been found fossil elsewhere. The extremely minute size 

 and fragile character of the species would make their recognition in 

 shales like those of Florissant, very difficult. 



The Amber species found are listed on page 111. 



EVANIIDAE. 



Up to the present time there are two references in palaeontological 

 literature to fossil Evaniidae. Burmeister ('31) records the occurrence 

 of Evania in Baltic Amber, and Brischke has later ('86) mentioned a 

 species belonging to one of the closely related genera, quite probably 

 the same genus under the name of Brachygaster, from the same source. 



In the present material I have discovered two finely preserved species 

 belonging to the Aulacinae, so that of the three subfamilies, Aulacinae, 

 Foeninae, and Evaniinae at present recognized, only the second is 

 unknown in the fossil state. 



Aulacus bradleyi, sp. now (Fig. 19.) 



Length probably about 18 mm., the abdomen missing. Entirely dark or 

 black, the legs somewhat lighter beyond the knees. Head seen from the 

 front three-fourths as broad as high, gradually narrowed and rounded below; 

 its surface minutely punctate or shagreened. Antennae inserted close to- 

 gether near the clypeus. Antennae much like those of recent species, the 

 joints of the antennal flagellum beyond the first long and cylindrical. Thorax 



