MONOGRAPH OF THE NOin^TT AMKRIOAN PROCTOTRYPID.E. 313 



two deep eloii^nated foveohe at l)ase, tlie space between tlieni sliowinj;' 

 some longitudinal stii.e, otherwise the whole surface is highly polished, 

 black. 



Habitat. — District of Columbia. 



Types in National jVIuseum. 



])escribed from several specimens bred by ])r. Riley hum the Cypress 

 Cecidomyiid (Crcidotin/in (•.andiiassa liiley); no date of rearing is given. 



Polygnotus viticola, s]i. iiox-. 



S 9. Length, 1.20 to 1.40""'. Black, polished; head a little more 

 than thrice as wide as long an tero posteriorly, the vertex posteriorly 

 transversely aciculated, the face smooth. Mandibles rufous. Antennae 

 10-jointed, brown or brown-black, the tlagellum not quite twice as long- 

 as the scape; pedicel hardly as long as the first and second funiclar joints 

 together and not as thick at tip as the second funiclar joint; first funi- 

 clar joiut minute, the second and third about of an equal length, but the 

 secoml the thicker; club 5 jointed, the joints briefly pedicellate, the 

 tirst tour joints as wide as long, cup-shaped, the last cone-shaped, 

 longer than the penultimate. 



In the S the Hagellnm is covered witli short, white, stiff hairs; the 

 second funiclar joint is larger and stouter than the pedicel; the club 

 0-jointed, the joints, except the last, oval-moniliforin, itedicellated, the 

 last cone-shaped, one and one half times as long as the penultimate 

 Thorax ovoid, polished, the mesonotal furrows very faintly indicated 

 l)Osteriorly, more distinct in the female, the basal i)oint of the middle 

 lobe projecting slightly upon tlie scntellum, the lateral lobes at base 

 slightly i)nbescent. iScutellnm transverse, high, convex, very sparsely 

 pubescent. Metapleura sericeous. TeguhT, rufo-piceous. Wings hya- 

 line, pubescent. Legs, including coxa^, rufo-piceous or brownish, the 

 tarsi paler, or yellowish. Abdomen ovate, scarcely longer than the 

 head and thorax together, jMunted at tip, the petiole striated, the sec- 

 ond segment with two long, striated foveola; at base, one on either side, 

 the third and fourth, with a transverse row of faint punctures, the fifth 

 and ibllowing segments closely punctate; the third, fourth, and tifth 

 ventral segments also show rows of punctures. In the S the abdomen 

 is shorter, oblong-oval, the third, fourth, fifth, and sixth segments with 

 a single row of })unctures at base, while the corres])onding ventral seg- 

 ments show rows of very faint punctures. 



Habitat. — AVashington, D. C. 



Types in National IMuseum. 



Described from several specimens, reared March 31, 1882, from a Ceci 

 domyiid gall on the petiole of a grapevine, collected on the grounds of 

 the De|)artment of Agriculture. 



