NO. 1200. ICHNEUMON FLIES— ASHMEAD. 143 



Tribe III. RHOGADINI. 



1862. Rhogadoidvr, Family (5, Forster, Veih. d. naturli. Vcr. pr. Ilhoinl., XIX, 



pp. 228 and 240. 

 1885. RhogadidesM\TX&T{A\A,, Trans. Ent. Soc. Lond., p. 10. 



1887. Rhogadincc, Subfamily, Cresson, Syn. Hym. North America, p. 58. 



1888. Rhogadidx, Tribe YIII, Marshall, Species des Hymen, des Braconides, I, 

 p. 66. 



1900. Rhogadini, Tribe III, Ashmead, Smith's Insects of New Jersey, p. 596. 



The species falling in this tribe are very characteristic, and among 

 the easiest of all Braconids to recognize ]\y the longitudinal carina' on 

 the first and second abdominal segments and their characteristic 

 sculpture. 



Five genera fall into this tribe, all occurring in our fauna. They 

 may be readily distinguished by the use of the following table: 



TABLE OF GENERA. 



Suturiform articulation obsolete 2 



Suturiform articulation distinct, crenulate 4 



2. Abdomen not longer than the head and thorax united, in female not strongly 



compressed 3 



Abdomen longer than the head and thorax united, in female strongly com- 

 pressed from before the middle toward the apex; ovipositor subexserted; 

 second cubital cell rectangular (1093) Petalodes Wesmael. 



3. Tarsi very short, hardly half the length of the tibite; second cubital cell small, 



shorter than the first abscissa of the radius ( 1094) YeUcones Cameron. 



4. Third joint of the maxillary palpi normal 5 



Third joint of the maxillary palpi dilated inwardly; ovipositor slightly exserted. 



(1095) Pelecy stoma Wesmael. 



5. First al)scissa of the radius longer than the second, the second cubital cell quad- 



rate; terminal abdominal segments more or less retracted. 



(1096) Hctcrogamus Wesmael. 



First abscissa of the radius shorter than the second, the second cul)ital cell 



longer than wide, or trapezoidal (1097) Rhogas Nees. 



Tribe IV. DORYCTINI. 



1862. Doi'i/cloida\ Family 4, Forster, Verb. d. naturh. Ver. i)r. Kheinl., XIX, pp. 



227 and 238. 

 1885. Dori/rtldes Marshall, Trans. Ent. Soc. Lond., p., 9. 



1887. Dorgdm.r, Subfamily, Cresson, Syn. Hym. North America, p., 57. 



1888. Doryctidx, Tribe VI, Marshall, Species des Hymen, des Braconides, I, 

 p. 65. ' 



1900. Doryctini, Tribe II, Ashmead, Smith's Insects of New Jersey, p. 596. 



This tribe has been heretofore treated as a su])family equivalent in 

 value to the Braco)iinw, with which some of them are frequently con- 

 fused, although the}^ ought not to be, since the head is distinctly 

 margined and the venation of the hind wings is wholly different, the 

 submedian cell being very long, longer than half the length of the 

 median. 



