MONOGRAPH OP THE NORTH AMERICAN PROCToTRYPIDvE. 3tl 



Metapleur«*i bare, faintly striated, Tegnlse nilbns. Wings hyaline. 

 Legs brownish-pieeons, the trochanters, tips of anterior tibia^, and all 

 tarsi ])aler. Abdomen polished, not longer than the head and thorax 

 together, the petiole striated; the second segment, at base on either 

 side, with two striated foveol*, the striie extending to the middle of 

 the segment. 



Habitat. — Washington, D. C. 



Type in National Museum. 



Bred February 25, 1881, from Cecidomyla symmetrica O. S., a gall 

 common on the leaves of various oaks. 



Polygnotus laticeps, sj). nov. 



$ 9. Length, 1.2 to 1.9""'. Polished black, impunctured; head 

 very wide, fully 4 times as wide as long antero-posteriorly; the occi- 

 put transversely aciculated, the face tiat and highly polished, the lat- 

 eral ocelli about twice their width from the ntargin of the eye. An- 

 tenufe and legs black or brown black, trochanters, base of tibia% and 

 tarsi paler brown. Thorax rounded before, rather short, with distinct 

 parapsidal furrows posteriorly, the middle lobe projecting a little upon 

 the base of the scntellum, the scut«llum highly convex, jwhshed, deeply 

 fovcated along the base; metathorax short, the pleura faintly striated or 

 pubes(;ent. Abdomen broadly ovate, the apical, ventral, and dorsal 

 segments with transverse rows of punctures. Wings hyaline. Theau- 

 tennjc in the $ terminate in a "> Jointed club, the joints, except the 

 last, being as broad or a little broader than long; in the 9 the joints 

 are longer than wide. 



Habitat. — Jacksonville, Fla. 



Types in Coll. Ashmead. 



Polygnotus hiemalis Forbes. 

 Platygashr humalis Forbes, Psyche, Vol. 5, p. 39 (1888). 



S 9. Length, 0.80 to 1.40""". Black, polished; head about two 

 and a half times as wide as long antero-posteriorly, the vertex poster- 

 iorly only faintly aciculated, the face smooth, polished. Antenna; 10- 

 jointed, brown-black, the flagellum twice as long as the scape; pedicel 

 as long as and much stouter than the first two funiclar joints; first 

 fuuiclar joint small, not longer than thick, yellowish basally; second 

 larger and a little longer than the third; club 5 jointed, the joints, 

 except the last, a little longer than wide, the last cone-shaped, one- 

 half longer than the preceding. In the male the second funiclar joint 

 is thickened, curved, and as long as the pedicel the latter whitish or 

 yellowish at tip; the first funiclar joint small, coh.racted atbase; club 

 6 jointed, villose, the joints oblong, slightly pedicellate, the first, the 

 shortest, narrowed basally, the last ovate, not quite twice as long as 

 the penultimate. Thorax ovoid, polished, the mesonotal furrows del- 



