300 BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



Polygnotus diplosidis, sp. nov. 



9 . Leiigtli, 1""". Polislied, black; bead as in P. saHcicola, but tbe 

 vertex posteriorly is not so strongly acicnlated. Mandibles yellow. 

 Antonnte 10-jointed, brown-black; pedicel longer and stonter tlian the 

 two following joints together; first three fnniclar joints about eipial in 

 thickness, the tirst and second small, about equal in length, the third 

 very slightly longer; club 5-jointed, joint 1 not quite as thick as the 

 following, 2,3, and 4 aboute(^ual, a little longer than thick, cup-shaped, 

 the last cone-shaped, H times as long as thei)receding. Thorax ovoid, 

 not nuich longer than wide, without a trace of the furrows, polished. 

 Scutellum transversely, highly con\ex, smooth, shining. Metapleura 

 sericeous. Teguhe black. Wings hyaline, i)ubescent. Legs brown- 

 black, the base of tibiie and tarsi j)aler. Abdomen as long as the thorax, 

 polished, the petiole striated, i)ubesceut beneath, the second segment 

 with two striated foveohe at base. 



Habitat. — New Brunswick, N. J. 



Type in ISational Museum. 



The specimens were reared February 12, 1891, by Prof. John B. Smith, 

 from a Cecidomyiid, 2>//>/o.s«6- sj). found on pine. 



Polygnotus baccharicola A^hm. 



(PI. xiij, Fig. 2, 9.) 



Can. Ent. xix, p. 132; Cress. Syu. Hyui., p. 250. 



S 9. Length,! to 1.20""". Black, shining; head broadly transverse, 

 the vertex iJosteriorly transversely acicnlated; lace smooth, with some 

 aciculations just above the insertion of the antenn;e. Mandibles 

 piceous. Antennae lO-jointed, black tobrown-black, the scape sometimes 

 pale at base and apex, Avith the i)edicel and first and second funiclar 

 joints sometimes pale; pedicel in S as long as the first and second 

 funiclar joints together; joint 1 of funicle very minute, second as thick 

 as long; third smaller; club 5-jointed, the first joint longer than wide; 

 the following joints to the last a little wider than long; in 9 the club 

 is 4:-jointed, the joints stouter than in the S . Thorax short, ovoid, 

 smooth, and shining, without a trace of the mesonotal furrows. 



Scutellum transversely, highly convex. Metapleura sericeous. Teg- 

 uhe piceous. Wings hyaline. Legs, including coxa', rufo-i)iceous; 

 trochanters, base and tips of tibia\ and the tarsi honey-yellow. Abdo- 

 men longer than the thorax, polished; the petiole striated, the second 

 segment with two striated foveohe at base. 



Habitat. — Florida. 



Types iu Coll. National Museum and Coll. Ashmead. 



^Liny specimens reared by myself at Jacksonville, Fla., from Cecido- 

 inijia hacrharicolH Aslun, MfcJ. 



