110 PROCEEDINGS OF THE NATIONAL MVSEmi. vol.xxiii. 



Stigniii linear, of an equal thickness througliout, or very iniperfe})til)ly thick- 

 ened toward hii>; nietathorax and first segment of abdomen thickly 

 hairy. 

 Marginal cell extending almost to the tip of wing. 



(881) T(ni!/><lroph(t Fr)rster. 

 Marginal cell shorter, not nearly extending to tip of wing. 



(882) Rhizarrlm Fi'irster. 



18. Marginal roundly widened; second abscissa of the radius ?;of equally and regu- 



larly curved, therefore not forming a perfect segment of a circle. 19 

 iSIarginal cell narrower; second abscissa of the radius quite regularly curved, 



forming a perfect segment of a (rircle. 



Set'ond diseoidal cell closed (883) Gyrocampa Forster. 



Second diseoidal cell open ( 884 ) Syndix Fr)rster. 



19. Second diseoidal cell completely closed 20 



Second diseoidal cell open at apex or entirely absent. 



Antennae in female with vwre than 20 joints (885) Ddcnuxd llaliday. 



Antennae in female with less than 20 joints. 



Second diseoidal cell absent (886) Coloneura Forster. 



Second diseoidal cell present but open behind; parapsidal furrows 

 wanting or indicated only anteriorly (887) Stiphrocera Forster. 



20. Marginal cell long and wide, extending to the apex of the wing; first joint of 



flagellum a little longer than the second (888) Liposcia Forster. 



Family LXXVIII. BRACONID^. 



1811. Ichneumon mJsciti Nees (part) , Der Ges. naturf. Fr. z. Berl. Mag., Y, p. 3. 

 1811. Bracones, Family I, Der Ges. naturf. Fr. z. Berl. Mag., V, p. 3. 

 1838. Braconidx, Family IV, Haliday (part) , Ent. Mag., V, p. 4. 

 1885. Bracoviche, Family, Marshall (part). Trans. Ent. Soc. Lond., ]». 1. 

 1887. Braconida' Cresson (part), Syn. Hym. North America, p. 53. 

 1900. Braconidn', Family LXXYIII, Ashmead, Smith's Insects of New Jersey, 

 p. 586. 



This family is here restricted to the Braconids having the mandibles 

 normally attached, as in the Ichneumonids, and touching- or overlapping 

 each other when closed, never attached to the sides of the face and 

 spreading wide open as in the Alysiidm. 



In structure and habits the Bmconldw are nearest related to the TcJi- 

 neuinonidi^^ but are easily separated by having only one recurrent 

 nervure, or none, and by the absence of a real articulation, except in 

 the subfamily Apliid,ima\ between the second and third abdominal 

 segments. From the ErdnHdw and the Steplianidw they may be 

 readily distinguished by the absence of a distinct costal cell in the 

 front wings and by cephalic and abdominal peculiarities. The group, 

 through the subfamily Spatlunuv and the iStephanidcB^ is connected 

 with the OrymidcB, and will account for the arrangement of th(^ sub- 

 families in this work. 



Fifteen distinct subfamilies have been recognized, arranginl, and 

 tabulated, as follows: 



