138 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



Tribe i. — Telenomini. 



This tribe was first separated by Thomsoji, OtVers, af K. Vet.-Akad. 

 Forh., 1800, p. 100, Avith two geuera, TelenomuH ami Phanurus, to which 

 I here add Trimorus Fiirster, and three new genera, viz., Trisftolcun, 

 Uissolcns, and Aradophuffiis, all distinguished from other genera in the 

 Scelioninm by the absence of the lateral cariiiii*, on the abdomen. 



The species are all minute or microscopic in size, and are parasitic in 

 the eggs of various insects, those of Lepidoptera and llemiptera being 

 particularly subject to their attack. 



The six genera included in the tribe may be thus distinguished: 



TABLE OF (lENERA. 



Females, with ll-joiiited, cltivaf e auteuna^ 2 



Females, with 12-jointed antenna" 4 



2. Lateral ocelli not toiichinjj; the niarfjin of the eye 3 



Lateral ocelli touching the niarj:tin of the eye. 



Mesonotum with 2 furrows. 



Post-scutellum spined Trimoui's Fiirster. 



Mesonotum without furrows. 

 Post-scutellum not spined. 

 Hea<l quadrate ; ahdomeu pointed ovate, the ovipositor usually ex- 



serted Phanurus Thorn. 



Head transverse, often very broad, abdomen broadly oval, usually 



truncate at tip Tklenomis Hal. 



3. Mesonotum with 3 furrows, abbreviated anteriorly. 



Frons very broad; a short but distinct groove extends from the eye back 



of th'e lateral ocellus to the occiput ..Trissoixts Ashni., gen. nov. 

 Mesonotum with 2 furrows, abbreviated anteriorly. 

 Frons not very broad l)iS80ixr.s Ashm., gen. nov. 



4. Mesonotum without furrows. 



Head large, flat, the ocelli in a triangle, the laterals nearer to the front 

 ocellus than to margin of eye; wings banded. 



Aradophagus Ashm., gen. nov. 



TRIMORUS Fiirster. 



Hym. Stud., ii, p. 101 (18.56). 



(Typo r. nanun. Walk., ^ ; V. phiUas, Walk., 9.) 



Head transv^erse, a little wider than the thorax, the occiput delicately 

 margined; ocelli 3, the lateral close to the eye; eyes ovate; subpu- 

 bescent. 



AntennjB in both sex'vs 12-jointed; in 9 clavate, the club o-jointed; 

 in 5 filiform-moniliform or subnioniliform. ,. ^^^ :■-... . •; 



Maxillary jialpi 3-jointed. 



Mandibles bifid 



Thorax ovoid, the protliorax depressed above, produced into a little 

 neck anteriorly; mesonotum with 2 furrows; scutellum convex, semi- 



