126 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxiii. 



STil:)faiiiily IX. CKKLC )NINvE. 



1818. Chcloni, Family 11, Nees, Berl. Mag., VII, p. 2(30. 



1862. Chelunoidiv, Family 9, Verh. d. Naturh. Ver. i)r. Rheiiil., XIX, i)p. 228 



and 243. 



1885. Chdomdes M.^rshall, Trans. Ent. Soc. Lond., p. 10. 



1887. Chelonimv, Subfamily, Cresmon, Syn. Hym. North Anier., pp. 5-4-55. 



1888. Chdonid.r, Tribe X, Marshall, Sjiecies des Hym. des Braconides, I, p. (>(>. 

 1900. Chelonimv, Subfamily IX, Ashmead Smith's Insects of New Jersey, p. 591. 



Allied to the Sigalphinm and separated from them by having- three 

 (■ii))ital cells in the front wings; otherwise they are identical. 



The tribe is represented b}" eight genera, all found in the United 

 States, except Trachypetus Guerin, which is tropical. 



All may be easily recognized by the use of the following table: 



TABLE OP GENERA. 



Wingless species 7 



Winged. 



First cubital and first discoidal cells separated, not confluent; ej'es bare 2 



First cubital and first discoidal cells confluent, the first abscissa of the cubitus 

 absent or incomplete; abdomen not segmented; eyes hairy. 



(972) C/(e/o/(».s' Jurine. 



2. Recurrent nervure joining the first cubital cell or interstitial with the first 



transverse cubitus 3 



Recurrent nervure joining the second, cubital cell 4 



3. Abdomen not segmented; first discoidal cell petiolate. 



Second cubital cell subtriangular, the second abscissa of the radius usually 

 shorter than the first; submedian cell longer than the median; abdomen 



at apex not biclentate (973) Ascogaster Wesmael. 



Second cubital cell oblong-quadrate, the second abscissa of the radius at 

 least three or four times longer than the first; submedian cell not longer 

 than the median; abdomen at apex bidentate. 



(974) Gastrotheca Guerin. 

 Abdomen 3-segmented; first discoidal cell sessile or subsessile. 



(975) Pluvwratoma Wesmael. 



4. Alxlomen tiot el<ingate clavate, oval or oblong-oval, with from 3 to 4 segments. . 5 

 Abdomen elongate clavate, with 2 segments, tlie first long, i)etioliform; antennae 



very long, filiform, about twice the length of the body. 



(976) Trachypetus Guerin. 



5. Abdomen normal, not tumid, the lateral margins of segments not extending over 



the sides beneath; ovipositor prominent or subexserted; clyjieus not 



prominent 6 



Abdomen tumid, the lateral margins of the segments extending over the sides 

 beneath; clypeus prominent; second cubital cell longer than wide. 



(977) Sphaerojn/x lUiger. 



6. Second cubital cell wider than long; joints 1 and 2 of maxillary palpi dilated, 



the last two very small, shorter than the second. 



(978) Tetrasphaeropyx Ashmead. 

 Second cubital cell longer than wide; maxillary palpi normal, the last two joints 

 elongate, as long or a little longer than the second. 



(979) Acampsis Wesmael. 



7. Abdomen with 3 or 4 segments (979 ) Acanipsis Wesmael. 



