46 Bulletin Wisconsin Natural History Sosiety. [Vol. 8, No. 1. 



spinose. Wings hyaline basally, strongly infuscated on their apical 

 half ; nervures pale brown. Median and submedian cells completely 

 closed, of equal length on the externo-niedian nervure. Stigma very 

 minute, about twice as long as thick; marginal vein as long as the 

 linear stigma, straight. Body sparsely set with conspicuous black hairs. 

 Described from a female specimen collected by Professor W. 

 M. Wheeler at Forest Hills, Mass. 



This is the fifth species to be discovered and may be distin- 

 guished by the aid of the following key : 



! Laelius Ashmead. 



1. Wings conspicuously bicolored ; basal half hyaline, apical half 



fuscous f umipennis Brues. 



Wings hyaline or evenly somewhat grayish 2 



2. Legs entirely yellow or rufous 3 



Legs with all coxse and femora except tips of the latter, black. 



trogodermatis Ashmead. 



3. Superior face of metathorax with four discal carinse. 



rufipes Ashmead. 

 Superior face of metathorax with three discal carinse. 



tricarinatus Ashmead. 

 Superior face of metathorax with one discal carina. 



nigripilosus Ashmead. 



FAMILY SCELIONIM:. 



Hadronotus robustus Brues. 

 Bull. Wisconsin Natural History Society, Vol. 5, p. 156, (1907). 



This species occurs also at Fayetteville, Arkansas, from whence 

 Dr. C. F. Adams has sent me a male specimen. The male is very 

 similar to the female first described, differing mainly in the con- 

 formation of the antennae. These are quite distinctly thickened 

 from the base of the flagellum and the pedicel is scarcely over half 

 the length of the first flagellar joint, while the second and follow- 

 ing joints are quadrate or slightly moniliform. 



The following dichotomy will serve to distinguish the species 

 of Hadronotus at present known to occur in North America. 



