BRUES: PARASITIC HYMENOPTERA. 73 



Metanotum coarsely rugose-reticulate, its tip produced beyond the insertion 

 of the hind coxae. Abdominal petiole as long as the slope of the metathorax, 

 rather suddenly widened above at the tip; second segment one-fourth longer 

 than the first, slender and very gradually widened to the tip where it is one- 

 fourth as high as long; third three-fifths as long as the second and twice as 

 high at the tip ; third a little shorter than either the fourth, fifth or sixth which 

 are subequal. Ovipositor nearly as long as the petiole. Hind legs long as is 

 usual in the genus, the tibia as long as the trochanters and femur together; 

 metatarsus twice as long as the second joint. Wings distinctly infuscated, 

 fulvous. Marginal cell long, about three and one-half times as long as its 

 greatest width, its second section twice as long as the first; transverse cubitus 

 long, distinct; nervure at tip of third discoidal cell broken at its middle, its 

 parts meeting at a distinct though very obtuse angle. 



Type.— No. 2259, M. C. Z., Florissant, Col. (No. 1334, S. PI. 

 Scudder Coll.). 



This is a rather puzzling form on account of its antennae which are 

 shorter, with fewer joints, and not so distinctly setaceous as those of 

 recent forms belonging to this tribe. However, its seems to agree w ith 

 Exochilum in other respects and I hesitate to erect a new genus for its 

 reception. 



Aside from the doubtful Ophion or Campoplex discovered by 

 Sordelli ('82) in the Quaternary at Pianico, Italy, no fossil members 

 of the Campoplegini have been so far described. I have found two 

 genera among the Florissant collection, one apparently undescribed, 

 represented by two species, and the other Limnerium sensu lato, a 

 very widely distributed recent genus, represented by five species. 



Hiatensor, gen. nov. 



Body elongate, the metathorax produced posteriorly between the insertion 

 of the posterior coxae into the neck-shaped tip characteristic of the Anomalini 

 and Campoplegini. Abdomen shaped as in Campoplex; clavate, the first 

 and second segments forming a long pedicel which slightly exceeds the length 

 of the remainder of the abdomen in the type species, but is shorter in the 

 second species. Hind legs exceedingly elongate, the tips of the femora extend- 

 ing considerably beyond the tip of the abdomen. The coxae are not particu- 

 larly elongate, but the trochanters, femora, and tibiae as well as the tarsi are 

 much longer than usual; the femora are strongly clavate, thickened on their 

 apical one-half, being four or five times as thick at the apical third as at the 

 base. Tibiae as long as the femora, with a short spur; tarsi slender, not at all 

 thickened. Wing with a very slender, nearly linear stigma; areolet wanting, 

 the second transverse cubitus long; recurrent nervure received just beyond 

 it; first recurrent nervure received before the basal third of the discocubital 

 cell; submedian cell slightly longer than the median. 



