NEW SERPHIDOID CYNIPOID, AND CHALCIDOID 

 HYMENOPTERA. 



By a. a. Girault. 



Oj the. Bureau of Entomology, United States Department of Agriculture. 



The following descriptions and notes are based upon material in 

 the collections of the U. S. National Museum. North America forms 

 make up most of the matter. 



SERPHIDOIDEA. 



POLYMECUS SEMIGLABER, new species. 



Female. — Length, 1.05 mm. 



Differs from compressiventris Ashmead in not having the distinct 

 deep parapsidal furrows nor the distinct scaly sculpture on the 

 mesonotum nor the convex rounded caudal margin of the abdominal 

 Segments and in being very much smaller and so on. From insularis 

 Ashmead in having the upper occiput finely cross-lined instead of 

 densely reticulato-punctate, the parapsidal furrows obsolete or nearly 

 and as indicated, farther apart distad (separated by the width of the 

 base of the scutellum but very indistinct, obsolete or nearly), the 

 scutellum is much less armed at apex and so on. From canadensis 

 Ashmead, in being very much smaller, in lacking the deep parapsidal 

 furrows and distinct scaliness of the scutum, segment 3 of the abdo- 

 men is not striated so distinctly at base and so on. Cephalic aspect 

 of head very delicately scaly, also cephalic scutum. Base of scape, 

 Segment 2 of abdomen (counting the first body segment as such) 

 often and the legs reddish yellow. Club 5-jointed, all the joints sub- 

 equal or a little longer than wide except the last which is the longest 

 flagellar joint except the pedicel. Funicle 2 distinctly shorter than 

 the pedicel but a little longer than wide, 1 and 3 shorter than 2. 

 Segment 3 of abdomen reaching nearly to the middle, much the long- 

 est, 4, 5, and 6 subequal, each somewhat wider than long, 7 conical 

 and somewhat longer than wide. Ovipositor extruded for a length 

 equal to over half that of the abdomen. Scutellum glabrous. Propo- 

 deum with a strong carina on each side of the meson. Segment 2 of 

 the abdomen with about six striae along its meson, 3 finely striate 



Proceedings u. S. National Museum. Vol. 58-No. 2332. 



181404— 21— Proc.N.M. vol.58 12 177 



