82 Bulletin Wisconsin Natural History Society. [Vol. 8, No. 2. 



and the body is more metallic, while the wings are different both 

 in venation and form of maculation. The European form is also 

 parasitic on Scolytid beetles, having been reared from several 



species. 



It is possible that the present species is identical with another 

 European one referred to by Forster (Hym. Stud., II, p. 70) as 

 C. intermedins, but never described. 



FAMILY DIAPRIID^E. 



Auxopaedeutes lyriformis sp. nov. 



Female. Length 1.6 mm. Black: legs, including the coxae, scape 

 of antennas and tegulse, yellowish brown; funicle and club of antennae 

 fuscous. Head seen from the side with a large projecting frontal 

 horizontal lamina below the antenna? making the head as thick as 

 high. Seen from above, the head is as thick as wide, narrowed anteri- 

 orly to the frontal lamina which is two third as wide as the greatest 

 width of the head and almost squarely truncate on the anterior mar- 

 gin; above it is hollowed out into two contiguous pits for the reception 

 of the antenna-. Ocelli in a triangle upon the vertex. Antenna; 12- 

 jointed ; scape large and stout, as long as the following five joints 

 taken together; pedicel cylindrical, half longer than thick; first flagel- 

 lar joint narrowed at the base, a little shorter than the pedicel ; second 

 to seventh about equal in size, monilif orm ; eight moniliform. twice as 

 large as the preceding; last two joints forming a large club nearly as 

 long and about as wide as the scape, the penultimate joint being 

 broader than the apical one. Eyes small, oval, with about ten rows of 

 ommatidia. Mandibles small, hidentate. Surface of head entirely 

 smooth and polished except for a shagreened space just below the 

 middle of the edge of the frontal lamina. Thorax nearly truncate in 

 front, the prothorax visible only as a line medially, but well developed 

 on the sides of the mesonotum which is rounded and narrowed in 

 front. Mesonotum as long as broad between the tegulae which are 

 large and contiguous with the line indicating the posterior margin 

 of the mesonotum. Scutellum broad at the base with a depression 

 near the center which gives off lateral depressions that divide it into 

 two basal lateral convexities and a larger posterior one. Metathorax 

 seen from above with a projecting truncate horn on each side which 

 extends over the first segment of the abdomen, each horn being as 



