G. C. DAVIS. 319 



HADRODACTYI.US Foerstei. 

 (Synopsis der Fam. uud Gatt. dor Ichneumoiien. 1868.) 



This geuus contains species of the largest and most elongate rep- 

 resentatives of the Mesoleptini. They are classified primarily by 

 the third tarsal segment being equal in length to the third tarsal 

 member ; but kindred characters, which seem to mark the species 

 from many others, is the form of the clypeus, which is transverse, 

 broadly rounded on the front edge, not depressed and not separated 

 from the face by a distinct groove, and in the submedian cell being 

 longer (usually much longer] than the median on the externo-median 

 nervure ; antennte are long, slender ; areolet of wing present, trian- 

 gular, petiolate ; mesonotum with parapsidal grooves; metathorax 

 more or less distinctly cariuate ; abdomen elongate, narrow, petiole 

 slender ; legs long and slender. 



Thorax black. 



Second abdominal seorment scarcely lonjjer than broad ; posterior legs rufous 

 abdomen sometimes dusky at apex incept us Cress- 

 Second abdominal segment nearly twice as long as broad. 



Abdomen black at apex ; petiole rufous, coxai variable- ■ -eloiigatus Cress. 

 Abdomen black at base, apex rufous or dusky; posterior cuxte black, femora 



rufous cCKatiiisi n. var. 



Abdomen black at base and apex ; posterior femora and coxiB black. 



feinoratus n. var. 

 Thorax rufous. 



Head black, face and hind tarsi yellow loilgicoriiis Ci'ess. 



Head and hind tarsi color of body riificoriiis n. sp. 



HadrodactylliN iiiceptiis Cress. [Mesoleptm), Trans. Am. Ent. Soc. ii, 96. 

 9 % . — 8-12 mm. Black, with abdomen and legs rufous, the former sometimes 

 dusky at base or apex ; face, scape beneath, mouth-parts, tegulpe, spot in front 

 and usually trochanters and four anterior coxae, yellow ; sometimes four anterior 

 legs and base of posterior tibise are yellow, antennje fulvous, paler beneath: wings 

 hyaline, nervures and stigma brown ; metathorax with longitudinal carinse. 

 petiole of abdomen slender, but broadening considerably behind the tuberculate 

 spiracles; second segment but little longer than broad. 



Three females and nine males from Massachusetts, New Hamp- 

 shire, Canada, Montana, Colorado, Nevada and Washington (types, 

 coll. Amer. Ent. Soc). 



Hadrodactyliis eloiigafus Cress. {Mesoleptiis), Tr. Am. Eut. Soc. ii, 96. 

 Mesoleptus annulatns Prov., Faune Ent. Can. ii, 397, 9 • 

 9 % . — 8-10 mm. Black, with abdomen, except the three or four terminal seg- 

 ments, rufous; face, scape beneath, mouth-parts, tegulse, spot in front, four an- 

 terior cox?e, trochanters, hind tibia? except apex and hind tarsi, yellow ; apex of 

 y)osterior femora and tibise dusky, remainder of hind legs rufous, antennpe ful- 

 vous; wings hyaline, nervures brown, stigma and nervures at base, yellow; 



TRANS. AM. ENT. SOC. XXIV. NOVEMBER. 1897. 



