ICHNEUMON-FLIES — GELINAE : MESOSTENINI 427 



States (one of them reaching southern Canada) and a tliird has been 

 collected near Brownsville, Texas. 



Key to the Nearctic species of Cryptanura 



1. Median basal part of second tergite black; whitish mark on metapleurum 



occupying only its dorsoposterior half; upper side of hind coxa of female 



without a black stripe 1. banchiformis (Megerle) 



Median basal part of second tergite white or yellow; whitish mark on meta- 

 pleurum covering most of its ventral as well as most of its dorsal part; 

 upper side of hind coxa of female with a black stripe 2 



2. Sublateral white stripe of propodeum strongly narrowed basad of the tooth 



(fig. 336, g); second tergite mostly mat, its punctures separated by about 

 their diameter; frontal horns low, not on a common base. 



2. septentrionalis Cushman 

 Sublateral white stripe of propodeum not narrowed basad of the tooth (fig. 

 337,a) ; second tergite completely polished, its punctures separated by about 

 2.5 times their diameter; frontal horns on a high common base. 



3. compacta (Cresson) 



1. Cryptanura banchiformis (Megerle), new combination 



Figure 336,f 



Ichneumon Banchiformis Megerle, 1802, Appendix ad catalogum insectorum, 



quae mense novembris 1802 Vienne Austriae auctionis lege vendita fuere, 



p. 16. [cf]. Type: cT, Georgia (lost). 

 Mesostenus spinarius BruUe, 1846, In Lepeletier: Histoire naturelle des insectes, 



hymenopt^res, vol. 4, p. 227; ?. T.ype: 9, Carolina (Paris). 

 Mesostenus albopictus Cresson, 1864, Proc. Ent. Soc. Philadelphia, vol. 3, p. 312; 



cf . Name preoccupied by Smith, 1858. Type: cf , Delaware (Philadelphia). 

 Mesostenus delawarensis Dalla Torre, 1901, Catalogus hymenopterorum, vol. 3, 



p. 540. New name for M. albopictus. 



Front wing 9.5 to 11.5 mm, long; frontal horns small, separated at 

 base; second tergite mat, less strongly mat in male, subpolished 

 basally and apically, its punctures small, sharp, separated by about 

 2.5 their diameter in female, a little coarser and closer in male. 



Male: Colored as in female except that scape sometimes has a 

 small white mark in front, front and middle coxae and trochanters 

 are entirely white, hind coxa blacldsh with a white stripe above, first 

 hind trochanter fuscous with the apex fulvous, hind femur blackish 

 with extreme base fulvous, apical 0.25 of hind tibia infuscate, front 

 and middle tibiae and tarsi whitish except that fifth segments of the 

 tarsi are brown, and hind tarsus wliite. 



Female: Black. Head, thorax, hind coxa, and abdomen marked 

 with white as in figure 336, f, the hind coxa mostly fulvous and basal 

 two segments of abdomen with some fulvous tinges; flagellum with a 

 broad white band; mesoscutum with a subcircular median white spot; 

 mediobasal part of scutellum black; front and middle coxae light 



