148 PROCEEDINGS OF THE NATIONAL MUSEUM. voi.xxni. 



which have three cubital cells, never less, and by having a distinct sub- 

 median cell in fhe hind wings. 



Nine genera have been recognized, distinguishable as follows: 



TABLE OF GENERA. 



Upper hind angles of the metathorax produced into long spines 7 



Upper hind angles of the metathorax normal, unarmed 2 



2. Median and submedian cells in front wings usually of an rcjual length, very 



rarely with the submedian cell much the longer; antenn;e from 17 to 



36 jointed 3 



Median cell much shorter than the submedian; antennae 12-jointed. 



(1125) Chremylas HaUday. 



3. First transverse cubitus distinct, the first and second cubital cells not con- 



fluent 4 



First transverse cubitus more or less obsolete, so that the first and second cubi- 

 tal cells are confluent 6 



4. Subdiscoidal nervure not interstitial, strongly curved at the base 5 



Subdiscoidal nervure interstitial. 



Recurrent nervure received by the second cubital c-ell. 



(1126) Honnius Nees. 

 Recurrent nervure interstitial with the first transverse cubitus. 



(1127) Horinioplerus Girard. 



5. Head subquadrate; second abdominal segment long, with atransverse impressed 



line; wings fasciate; scutellum not flat, elevated or conical. 



(1128) OtlliJiormms Ashmead, new genus. 



(Type, Pamholus bifasclatus Ashmead, manuscript.) 



Head quadrate; second abdominal segment wilhout a transverse impressed line; 



scutellum not elevated. 



Submedian cell distinctly longer than the median; second abscissa of the 



radius not longer than the first transverse cubitus, usually shorter; hind 



wings in male v)ith a stigma (1129) Dendrosoter Wesmael. 



Submedian cell 7iot or scarcely longer than the median; second abscissa of 

 the radius usually much longer than the first transverse cubitus; hind j i 

 wings in male imt/(ou< a stigma (1130) Aloreutus Forster. ,5 



6. Head quadrate; hind wings in male with a stigma, rarely without. j 



Abdomen with 6 or 7 segments (1131) IleterospUus Haliday=.S'//norfa5 i .j 



Ratzeburg=: Crnop/mMcs Forster = Ear ybolus Thomson. •! 



Abdomen with only 3 visible segments; hind wings in male without a ' 1 



stigma (1132) Trissarthrum Ashmead, new genus, .t 



(Type, Dimeris maculipennis Ashmead, manuscript.) , |j 



7. Head transverse, the temples obliquely narrowed; recurrent nervure received ' '» 



by the first cubital cell ( 1 133) ) Pha^nodus Forster. I 



Tribe III. SPATHIINI. 



4. 



1862. Eus'pathiidse, Family 2, Forster, Verb. d. naturh. Ver. pr. Rheinl., XIX, 



pp. 227 and 236. 

 1885. Spathiides Marshall, Trans. Ent. Soc. Lond. , p. 9. 



1887. Spathiinse, Subfamily, Cresson, Syn. Hym. North America, p. 57. 



1888. Spathiidse, Tribe III, Marshall, Species des Hym. des Braconides, I, 

 p. 65. 



1900. Spathiini, Tribe III, Ashmead, Smith's Insects of New Jersey, p. 597. 



This tribe is easily separated by the characteristic abdomen, which 

 is always distinctly petiolate, the first segment being long and slender, 



ii 



