G. C. DAVIS. 293 



radius staTting before the middle, areolet obsolete ; humeral cross-nervure oblique 

 and broken at extreme base ; head and thorax pilose, polished; face tuberculate 

 and with afew scattering punctures; clypeus large, elevated, pilose and with a 

 strong row of bristles on apical margin, a small transverse impression near the 

 apex: parapsides indicated anteriorly; metathorax smooth, polished, cariuse 

 small, distinct; basal and superior areas and first and second pleural areas united, 

 the others complete; abdomen shining, gradually widening from base, subcom- 

 pressed at apex ; petiole subsessile, small dorsal carinse reach nearly to apex ; legs 

 moderate. 



Oue specimen from Washington (type, coll. Amer. Ent. Soc). 



HOLlflGREIVIA Foerster. 

 (Synopsis der Fam. und Gatt. der Ichneumonen, 1868.) 

 This genus differs but little in a general way from Mesolems ex- 

 cept for the inflated basal segment of the hind tarsi. The segment 

 is often compressed instead of circular. Body shagreened, often 

 opaquely so. Abdomen sessile and with carinie at base ; metathorax 

 not conjpletely areolated. 



Abdominal segments with plain white apical margins; pleurse and sterna rufous. 



Hind femora black f ar»«aliK Cress. 



Hind femora rufous cressoiii n. sp. 



Abdominal segments black, or with very slight, pale apical margins. 



Lateral margins of mesonotum white; scutellum pale; face with central white 



stripe eimrse Ashm. 



Lateral margins of mesonotum without white markings. 

 Scutellum pale, posterior tihise pale, dusky at apex ; sterna and lower pleurte 



white; stigma subtriaugular virgiuieiisii^ Ashm. 



Scutellum black. 



Stigma elongate, slender; face white ; sterna and pleurne black ( 9 ). meso- 



sternum marked with white {%) laiiCfOlata n. sp. 



Stigma subtriaugular; face black, clypeus white ; mesosternum and meta- 

 thorax piceo-rufous pieens n. sp. 



Holnigrenia tarsalis Cress. {Tryplion), Trans. Amer. Ent. Soc. ii, 106. 



9 . — 8 mm. Black, with U-shaped mark on face, mouth-parts, tegulse, spot 

 beneath, cuneiform mark on margins of mesonotum. scutellums, apical margins 

 of second and following abdominal segments and apical trochanter and narrow 

 annulus near base of tibise on hind legs, white; four anterior legs, hind coxse, 

 sterna and lower meso- and metapleura rufous; wings hyaline. 



The S described by Mr. Cresson is nowhere to be found. It 

 probably does not belong to this genus ; 9 from Connecticut and in 

 coll. Amer. Ent. Soc. 



Holnigrenia cressoni n. sp. 



9 . — 8 mm. Black, with mouth-parts, two spots on anterior mesonotum, tegulse, 

 spot before, spot beueath, scutellums. stripe on posterior mesopleuric. anterior 

 mesosternum, venter, apical margin of all the abdominal segments (broadest 

 toward apex), trochanters except basal part of posterior ones, four anterior coxse 



TR.\NS. AM. ENT. SOC. XXIV. OCTOBER. 1897. 



