138 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



Tribe i. — Telenomini. 



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

 Forh., 1800, p. 100, with two genera, TeJenomus aud Phanurus, to which 

 I here add Trimorvs Fiivster, and three new genera, viz., Trissolcus, 

 Dissolcns', and AradopJuKjiis, all distinguished from other genera in the 

 Scelioninw by the absence of the hiteral cat-inne 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 Ilemiptera being 

 particularly subject to their attack. 



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



TABLE OF flEIVEKA. 



Females, with ll-jointcd, clavate antenila', -..^ ^^^. .^^^.. .^^... 2 



Females, with 12-joiiited autenujc 4 



2. Lateral ocelli not touchin<r the margiu of the eye l l ...» ^ ^ . 8 



Lateral ocelli touchiug the margin of the eye. 

 Mesonotum with 2 furrows. 



Post-sciitelliim spiued ^....».. ^^ TiUMours Forstet- 



INIesonotuin without furrows. 

 Fost-scutcllum not spiued. 



Head quadrate; ahdomeu pointed ovate, the. ovipositor usually ex= 



serted Phaxuuus Thom. 



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



truncate at tip Telknomus Hal. 



3. Mesonotum with 3 furrows, abbreviated anteriorly. 



Frons Aery broad; a short l)ut distinct groove extends from the eye back 



of the lateral ocellus to the occiput . .Tki.s.solcu.s Ashm., gen. nov. 

 Mesonotum with 2 furrows, abbreviated anteriorly. 

 Frons not very broad DissoLcrs Ashm., gen. nov. 



4. Mesonotum Avithout furroAVS. 



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

 ocellus than to margin of eye; wings baiuled. 



Aradopuagu.s Ashm., gen. nov. 



TRIMORUS Fr.rster. 



Hym. Stud., ii, p. 101 (18r>fi). ' 



(Type r. uittnio. WhIU.. ^ ; 1'. phiJias, W.-illc.. 9.) 



Head transverse, a little wider than the tluuax, the occiput delicately 

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

 bescent. 



Antennjie in both sexes 12-jointed; in 9 clavate, the club 5- jointed; 

 in $ filiform-moniliform or submoniliform. 



Maxillary pali>i 3-joint('cI. 



Mandibles bifid. 



Thorax ovoid, the ])rothorax depressed above, i)rodu('ed into a little 

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



