ASHMEAD : CLASSIFICATION OF THE CHALCID FLIES 271 



necessary to use the compound microscope before the number of spurs, in these 

 minute chalcidids, can be definitely settled. 



Four distinct subfamilies, distinguished by the characters made use of in the fol- 

 lowing table, have been recognized : 



TABLE OF SUBFAMILIES. 



1. Metathorax at apex produced beyond the insertion of the hind coxte ; the abdomen petiolate or sub- 



petiolate 4 



Metathorax normal, not produced at apex 2 



2. Abdomen distinctly petiolate ; if subsessile it is elongate and strongly carinate beneath 3 



Abdomen sessile or subsessile. 



Antennae 8-lI-jointed, inserted just above the clypeus or close to the mouth border. 



Subfamily I. PiEENiNiE. 



Antennae 12-13-jointed, and most frequently inserted far above the clypeus, very rarely inserted 



just above the clypeus Subfamily II. Tridymin^. 



3. Antennae 12-13-jointed ; marginal vein always shorter than the subcostal, the costal cell normal ; 



second abdominal segment ofien large but not especially lengthened ; ovipositor not exserted ; meso- 

 thoracic furrows most frequently complete Subfamily III. Miscogasterin^. 



4. Antennae 13-14-jointed, subclavate, iusei'ted below the middle of the face ; front wings with the mar- 



ginal vein very long, usually fully as long as the subcostal vein ; second abdominal segment much 

 lengthened ; ovipositor usually exserted ; mesothoracic furrows incomplete ; c? antennae often verti- 

 cellate-pilose Subfamily IV. Lelapin^. 



Subfamily I. PIRENINiE. 

 1843. Pireniani, Tribus (partim), Haliday, Trans. Ent. Soc. London, III., p. 295. 

 1856. Pyrenoid£B, Familie (partim), Forster, Hym. Stud., II., pp. 18, 22 and 40. 

 1875. Pirenina, Tribus, Thomson, Hym. Skand., IV., pp. 12 and 187. 

 1886. Pireninse, Subfamily (partim), Howard, Ent. Amer., I., p. 198. 

 1899. PirenincE, Subfamily I., Ashmead, Proc. Ent. Soc. Washington, IV., p. 247. 



This group is of small extent, although widely distributed. It is separated from 

 the other subfamilies principally by the paucity of joints in the antennee, and most 

 of the species falling in it, whose parasitism is known, attack dipterous larvte. 



The genera Calypso and Macroglenes are easily separated by the different shaped 

 heads in the males. Neither Haliday nor Thomson, however, give the characters 

 to separate the females, and since I am only acquainted with Macroglenes, it has been 

 impossible to give characters to separate the females. 



table of genera. 



1. Females 2 



Males 9 



2. Eyes pubescent 3 



Eyes bare 5 



