260 HYMENOPTERA. 



I have since found a single tagmounted specimen of this 

 species in the collections of the United States National Mu- 

 seum labelled " Gonatocerus basilaris Ashm. 9 . Riley Co., 

 Ks., F. Marlatt, Nov. 9. 2204. 1407." It has been re- 

 mounted in balsam and deposited in the same collection. In 

 dried specimens of this species, the ovipositor is likely to be 

 withdrawn some distance toward the base of the abdomen 

 and thus to appear non-exserted. This was the case with 

 another specimen of this species captured by myself at 

 Vienna, Illinois, October 12, 1910, on the windows of a 

 stable. Still another female has been found subsequently 

 in the collections of the National Museum mounted on a tag 

 labelled "Arlington, Va." Thus this species is doubtless 

 widely distributed in the United States. 



What is undoubtedly the male of this species was found 

 in the collections of the U. S. National Museum, mounted 

 on a tag but with no labels. It is described herewith. 



Male. — Length, 0.60 mm. Smaller and more slender than the female, 

 the antennae longer than the body, the abdomen depressed, ovate. 

 Antennae 13-jointed, filiform, slender. Flagellum joints moderately 

 long, about four and one-half times longer than wide, the distal and 

 proximal joints subequal, a fourth shorter than any of the others which 

 are subequal, all longitudinally striate. Pubescence soft, sparse hairs. 

 Femora stout. Otherwise as in the female. 



From 1 specimen, same objective and optic. 



The type Gonatocerus anthonomi Girault is a single tag- 

 mounted specimen of each sex; I have seen four other para- 

 typical specimens of the species, three of them originally 

 tagmounted, all now in xylol-balsam. From the three tag- 

 mounted specimens it was learned that on the metathorax 

 there are two lateral longitudinal carinae, one on each side 

 of the spiracle but neither close to it, one being near the 

 meson, the other nearly in the lateral aspect. The sculpture 

 is scaly reticulation. The four paratypes* were reared at the 

 same time with the types. The species is common in Illi- 



* One of these paratypes, a female mounted on a slide, has been 

 deposited as accession No. 44,240 in the collections of the Illinois State 

 Laboratory of Natural History; and a male homotype, Urbana, 111., 

 May 30, 1910 as accession No. 44,218 of the same collection. 



