688. 

 CYNIPS NERVOSA. 



Order Hymenoptera. Fam. Diplolepidae. 



Type of the Genus, Cynips Quercus radicis Fab. 

 Cynips Linn., Fab., Curt. 



AntenncE inserted in a cavity in front of the face, longer than the 

 body in the males (1 (^), subsetaceous, pubescent, and 15-jointed, 

 basal joint the stoutest, short and ovate, 2nd the smallest ovate, 

 3rd the longest, suddenly bent and slightly emarginate towards 

 the apex, 4th shorter and linear, the remainder decreasing iu 

 size to the last joint, which is shghtly longer than the penul- 

 timate ; not longer than the body, slightly clavate and 14-jointed 

 in the females ( ? ), 3rd joint the longest but simple, 4th and 

 5th linear, 6th stouter and shorter, the remainder subturbinate, 

 apical joint a little longer, ovate-conic. In some species there 

 are only 13 joints. 

 Labrum undiscovered. 



Mandibles broad, subtrigonate, terminating in a strong tooth, 

 with a trigouate tooth next it, and sometimes a third inside (3). 

 Maxillce terminated by a double ovate hairy lobe. Falpi rather 

 long, hairy and 5-jointed, basal joint minute, 2nd long slender 

 and clavate, 3rd and 4th oblong, 5th the stoutest, elongate, 

 semiovate, the apex being truncated obliquely (4). 

 Mentum elongated, narrow, a little dilated anteriorly, forming 

 shoulders for the insertion of the Palpi, which are short stout 

 and biarticulate, basal joint the longest, 2nd ovate-conic. 

 Obs. there is an indistinct suture giving an appearance of a 

 central joint, which is fully developed I believe in some species. 

 Labium moderate, hollow rounded and pubescent (5). 

 Head short transverse ; face suborbicular : eyes small, lateral and ovate : 

 oceUi forming a large depressed triangle on the crown. Thorax 

 gibbose, ovate, collar very short : scntel semiovate. Ahdomen smaller 

 than the thorax, especially in the male, ovate compressed and trun- 

 cated obliquely, attached by a short thick petiole, basal joint large, 

 apical ones very short : oviduct slender and curved, attached above 

 near the apex, and emerging through a sheath below and 2 large cla- 

 vate ones above. Wings, superior very much longer than the body, 

 with a large subtrigonate marginal cell, discoidal cells incomplete, 

 but occasionally ivith a triangular areolet, costal nervure none (9) .• 

 inferior rather small, with 2 basal nervures. Legs strong, hinder 

 the longest: coxse, hinder incrassated : tibiae simple, with minute spurs 

 at the apex: tarsi rather long, slender, and 5-jointed: claws and pul- 

 vUli small. Obs. the antennae are drawn from C. megaptera Panz. 



Nervosa Curt, Guide, Gen. 564. 4. 



Female black shining, obscurely punctured and slightly pube- 

 scent; antennae 14-jointed, as long as the body, 2 basal joints 

 brownish : ocelli very large : postscutel rugose with 3 parallel 

 ridges : abdomen very smooth and ochreous, the lower sheath 

 brown ; wings pale fuscous, iridescent, nervures brown, edges 

 of marginal cell suffused ; anterior legs pale ochreous, interme- 

 diate brown, hinder piceous, base of all the thighs darker, apical 

 joint of tarsi fuscous. 



In the Author's Cabinet. 



