30G BULLETIN 45, UNITED STATES NATIONAL MUSEUM. 



Polygnotus diplosidis, sp. nov. 



9 . Length, 1""". Polislied, black; bead as in P. salicicolo, but the 

 vertex posteriorly is not so strongly aeiculated. Mandibles yellow. 

 Antennje 10-jointed, brown-black; pedicel longer and stouter than the 

 two following joints together; first three funiclar joints about equal in 

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

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

 following, 2,3, and 4 about equal, a little longer than thick, cup-shaped, 

 the last cone-shaped, 1 i times as long as the preceding. Thorax ovoid, 

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

 Scutellum transverselj', highly convex, smooth, shining. Metapleura 

 sericeous. Teguhe black. Wings hyaline, pubescent. Legs brown- 

 black, the base of tibije and tarsi ]>aler. Abdomen as long as the thorax, 

 polished, the petiole striated, pubescent beneath, the second segment 

 with two striated foveoht> at base. 



Habitat. — New Brunswick, N.J. 



Type in National Museum. 



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

 from a Cecidomyiid, J>?/>/o*iv si>. found on pine. 



Polygnotus baccharicola Ashm. 



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



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



S 5. Length, 1 to 1.20"'"'. Black, shining; head broadly transverse, 

 the vertex posteriorly transversely aeiculated; face smooth, wnth some 

 aciculations just above the insertion of the antenna'. Mandibles 

 piceous. Antennje 10-jointed, black to brown-black, the scape sometimes 

 pale at base and apex, with the pedicel 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 sumller; 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- 

 ular piceous. Wings hyaline. Legs, including coxje, rufo-piceous; 

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

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

 segment with two striated foveola'- at base. 



Habitat.— -Florida. 



Types in Coll. National Museum and Coll. Ashmeatl. 



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

 ttiyia baccharmh Ashm. MS. 



