1910] Brues, North American Parasitic Hymenoptera IX. 83 



long- as the scutellum. The horns are longitudinally striated and pro- 

 ject upwards in lateral view, while from above their inner margins 

 are parallel. Entire pro- and mesothorax, including- their pleurae and 

 the scutellum, smooth and polished. Metapleurae thickly pale yellowish 

 hairy, their posterior margin evenly concave from the cox;.- to the tip 

 of the horn above. Abdomen as long as the head and thorax, entirely 

 shining, fully one half wider then the thorax. First segment thickly 

 covered with dense pale yellow pubescence, only about one third as 

 broad as the following segment, and about twice as broad as long. 

 Second segment occupying nearly two-thirds of the remainder of the 

 abdomen, its sides parallel on the greater part of their length; third 

 to fifth segments subequal, narrowing in width ; sixth minute, trian- 

 gular. Ovipositor short, blunt. Legs with the femora slightly thick- 

 ened; the tibiae clavate, long and slender except the anterior ones. 



A female collected at Forest Hills, Boston, Mass., May 4, 1910 

 by Prof. W. M. Wheeler in a nest of Solenopsis molesta Say. 



This is the second species of this most remarkahle genus to 

 be discovered, the first, A. soda! is Brues 4 being also North Ameri- 

 can and occurring- so far as known only in Texas. The present 

 species may be distinguished by its longer metanotal teeth or 

 horns, which have their inner margins parallel, and not divergent 

 as in the Texan form. The configuration of the antennae is also 

 qnite different, the antepenultimate joint being much larger in 

 A. lyrifoniiis. 



The genus Auxopwdeutes is very closely related to the Euro- 

 pean Solcnopsia Wasmann, which has the antennae n-jointed, not 

 12-jointed as in the American genus. After seeing the present 

 species I am fully convinced that the genus belongs to the Diaprii- 

 dae and not to the Belytida? as I had previously thought might 

 possibly be the case. 



4) Trans. Amer. Ent. Soc, Vol. XXIX, p. 126. (1903). 



