PARASITICA — CYNIPIDiE. 33 



30. — Parapsidal grooves on anterior third wanting; second abdominal segment 

 with perpendicularly declivous posterior margin; the entire IkmIv, with 

 the exception of the larger part of abdomen, abundantly hairy; an- 

 teuute and tibise not fimbriate; (in N. Am. Oak-galls). 



27. Holcaspis Mayr. 

 Parapsidal grooves entire ; second abdominal segment above large, posteri- 

 orly prolonged, tongue-shaped (seen laterally triangular) ; the agamous 

 form is abundantly hairy, the antennje and tibife fimbriate ; the sexual 

 form is in great ]>art naked, the mesothorax polished, or nearly so, and 

 very shining; (in Oak-galls) 28. Dryophanta Fiirst. 



I- Males. 



Biise of scutellum, behind anterior margin, without trace of the usual fovese or 



transverse furrow 2. 



Base of scutellum with two fovete, or a transverse furrow 3. 



2.— Disc of scutellum not higher than mesothorax and without a round medial 

 impression , between the very high inserted antenna? and ocelli are two 

 short, deep antennal grooves, which are separated by a longitudinal 

 carina ; basiil and cubital veins joined by a single vein which lies be- 

 tween two elongate quadrate callosities; (in Acacia gjills). 



1. ' Eschatocerus ^layr. 



Di.sc of .scutellum higher than mesothorax, glabrous and with a medial, 



round, wrinkled fovea; no antennal grooves; wings without callosities; 



(in Maple-galls) 2. *Pediaspis Ti.schb. 



;5. — First annular abdominal segment longitudinally sulcate; the entire face 

 with radiating grooves ; frontal carina present, often very distinct and 



long, sometimes short and not distinct 4. 



First abdominal segment annular or handle-shaped, not grooved ; frontal 



carina wanting 5. 



4.— Marginal cell fully closed; antennse with 15 free joints; frontal carina 

 reaching usually to the lateral ocelli, rarely short ; (Inquiline in Oak- 

 galls) 12. Synergus Hartig. 



Marginal cell open at the wing margin, marginal nervure not extending to 

 margin of wing; antenna? with 14-15 free joints; frontal carina very 



.short; (Inquiline in Oak-galls) / 13. Saphols^tus Forst. 



.").— Face with two parallel carina? from antennal insertion to clyjieus; antennse 

 15-jointed, the third joint as long as fourth, it is emarginate and not 

 thickened; base of scutellum with two faint furrows; metatborax with 

 two parallel ridges; marginal cell entirely clo.sed ; (Inquiline in Oak- 

 galls) 11. Ceroptres Hartig. 



Face without such carinse 6. 



•).— Mesopleune, at lower half, with a .strong longitudinal groove, often wrinkled 

 or coarsely punctured (apparently excepting R. dichlocerus, whose % is 

 unknown to me) ; cheeks longer than half of the eyes ; third joint of 

 antenna? longest ; marginal cell entirely closed ; claws of posterior tarsi 



entire ; (in Eose-galls) 4. Rhodites Hartig. 



Mesopleurse without such groove 7. 



".—Second abdominal segment (really the second and third, which are united 

 without suture) exceeding and overhanging all the other segments ; face 

 with very sharp radiating striae ; clypeus usually not apparent ; meso- 



TRASS. AMER. EXT. 80C. (5) SCPPL. VOL. 1887. 



