NO. 1202. GENERA OF THE ENCYBTLN^—ASHMEAD. ■ 327 



CLASSIFICATION. 



The subfamily Encyrtinie, for convenieuce and the ready recognition 

 of the genera, if upon no other grounds, may be divided into four tribes, 

 as follows : 



TABLE OF TRIBES. 



Mandibles edentate, acute at apex 4 



Mandibles bi- or tri-dentate, or broadly truncate at apex, never acute ; tarsi always 



5-jointed 2 



2. Mandibles stout, 3-dentate at apes, although the teeth are sometimes very 



minute, the labrum usually conspicuous 3 



Mandibles not stout, or only moderately so, rather long and always bi-dentate 

 at apex, the labrum free; abdomen in female with the hypopygium large, 

 lanceolate or plowshare shaped, inclosing the ovipositor and extending 

 beyond the anus; second abdominal segment most frequently large; anten- 

 nte usually inserted just above the clypeus, rarely just below the middle 



of the face Tribe I. Ectromini. 



Mandibles stout, but short and polished, the apex broadly truncate, unarmed 

 or nearly so; labrum conspicuous; abdomen with the hypopygium less evi- 

 dently prominent, not projecting; body usually stout, not metallic; anten- 

 nae inse.rted below the middle of the face; hind tibitu with two spurs 



Tribe II. Encyrtini. 



3. Hypopygium not prominent; hind tibise with only one spur; body most fre- 



quently, but not always, metallic; antenme variable. ....Tribe III. Mirini. 



4. Tarsi 4- or 5-jointed ; marginal vein punctiform or subobsolete 



Tribe IV. Arrhenophagini. 



Tribe I. ECTROMINI. 



The species falling in this tribe are, as a rule, more elongate and 

 narrower, the marginal vein x>roportionately longer, the stigmal vein 

 shorter, while the mandibles are longer, narrower, and always bidentate 

 at apex. This last character, together with the prominent hypopygium, 

 in the female, may always be depended upon to distinguish a species 

 falling in this group. 



The genera may be recognized by the use of the following table: 



table of genera. 

 Males - 12 



Females : 



Face iLHth a distinct carina between the bases of antennae 8 



Face without such a carina, rarely with a rounded ridge. 



Anteunse inserted just above the clypeus or below the middle of the face. 



Species wingless or subapterous -. 6 



Species winged 2 



2. Front wings with the marginal vein rather long, a;t least twice as long as the 

 stigmal vein or even longer, the stigmal and postmarginal 

 veins short; scape slender, cylindrical. 

 Wings fuscous, marked with white bands or rays; frons broad, the lat- 

 eral ocelli nearer to the eye margin than to" the front 



ocellus (1) CaJoeeriniis Howard. 



Wings hyaline; frons not so broad, the lateral ocelli not nearer to the 

 eye margin than to the front ocellus. 



(2) Tetralophidea Ashmead, new genus. 



