248 MEMOIRS OF THE CARNEGIE MUSEUM 



I have divided it into four tribes, which may be distinguished by the characters 

 made use of in the following table : 



TABLE OF TRIBES. 



1. Abdomen sessile 2 



Abdomen petiolate 3 



2. Postmarginal vein wanting or only slightly developed, the stigraal vein very short, sometimes absent ; 



antennae inserted close to the mouth border 5 



Postmarginal vein always well developed, the stigmal vein rarely very short. 



Antennae inserted near the middle of the face, or at least always above an imaginary line 



drawn from the base of the eyes Tribe I. Chalcidini. 



Antennae inserted near the mouth border, or always belotv an imaginary line drawn from the 

 base of the eyes Tribe IV. Haltichellini (partim). 



3. Antennae inserted near the mouth border, or always below an imaginary line drawn from the base of 



the eyes 5 



Antennae inserted near the middle of the face, or always above an imaginary line drawn from the 

 base of the eyes 4 



4. Postmarginal vein very long ; ovipositor if prominent not very slender, the eighth dorsal segment often 



produced into a long compressed stylus Tribe II. Smicrini. 



5. Head normal, not cornuted. 



Abdomen petiolate Tribe III. Chalcitellini. 



Abdomen sessile Tribe IV. Haltichellini. 



Head abnormal, deeply excavated in front, cornuted ; abdomen petiolate or subpetiolate. 



Tribe V. Dirhinini 



Tribe I. Chalcidini. 



This group is distinguished by the sessile abdomen and by having the antennae 

 inserted near the middle of the face or at least never below an imaginary line drawn 

 from the base of the eyes. 



Through the genus Acanthochalcis it is related to the subfamily Leucospidinse, 

 while in the abdominal peculiarities of most of the species the group is much closer 

 allied to the tribe Haltichellini. 



Most of the genera attack principally lepidopterous insects in the pupal stage. 

 Phasgonophora, however, and probably also the allied genera Trigonura, Stypiura, 

 etc., prey upon wood-boring coleopterous larvse. 



TABLE OF GENERA. 



1. Females 2 



Males 12 



2. Scutellum normal, unarmed, although sometimes with a slight median depression towards apex ; if 



with a slight elevated plate behiud, the same is entire, rarely subemarginate 3 



Scutellum posteriorly armed, emarginate or produced 8 



3. Abdomen not ending in a long, distinct ovipositor, although the eighth dorsal segment is often much 



produced, long and compressed, resembling a stylus and enclosing the ovipositor 4 



