BRUES: NEW PHYTOPHAGOUS HYMENOPTERA. 271 



Megaxyela petrefacta, sp. nov. 



Female. Length probably about 13 mm., the head nearly effaced. Dark in 

 color, with the sutures of the abdomen pale on the sides ; these markings are 

 narrow near the base, but occupy the major parts of the several apical segments. 

 Terebra exserted 1£ mm., curved downward to the blunt tip. The abdomen is 

 somewhat cylindrical and slowly narrowed to near the tip, when it suddenly 

 rounds down to the base of the terebra. The head, antennae, thorax, and legs 

 are not well enough preserved for description, but the wings show clearly their 

 venation, although somewhat overlapped in position. The type is very similar to 

 that of Megaxyela major Cresson. The first marginal cell, however, lying just 

 beneath the stigma, is nearly twice as long as wide, and the first recurrent nervure 



Fig. 10. — Megaxyela petrefacta Brues. Fore-wing. 



is only two-thirds as long as the vein that meets it to form the tip of the 

 second discoidal cell. Otherwise the venation so far as preserved is scarcely 

 distinguishable from the recent species. 



Type. — No. 2049, 2050 (reverse), Mus. Comp. Zool., Florissant, Col. (No. 1386, 

 4295, S. H. Scudder Coll.). 



Due to splitting of the rock and subsequent weathering, only the abdomen and 

 wings are preserved, although the entire length can be made out. Tu venation 

 and size this species is remarkably similar to M. major Cresson, iiom Texas, of 

 which it is undoubtedly a close relative. So far no other recent species have 

 been discovered, and the genus appears to be restricted to the southwestern 

 United States. 



SIRICIDAB. 



Paururus Konow. 



According to Konow (:05) the fossil described by Heer as Urocerites spectabilis 

 from the lower Miocene of Radoboj belongs to this recent genus, and must be 

 known as Paururus spectabilis Heer. 



Sirex Linne. 



Two species referred to this genus have been recognized in Baltic amber by 

 Klebs ('89). 



