320 BULLETIN 15, UNITED STATES NATIONAL MUSEUM. 



Polygnotus laevicoUis, n\>. iiov. 



S. lieii^tli, r , Black, slijiiiiiji; tlu' head tiaiisverse with the liit- 



eral ocelli twice their width tVoni the eyv iiiaryiii; antcniiic brown, tlic 

 scai)e toward apex ami the itcdiccl at tip yellowish; h'<;s rufous; wiiij;>s 

 liyaliiH'; luesonotal furrows distinct. Tiic antennic are lO-joiiitcd, the 

 scape clavate, as lonji' as the thijicliuni; pt'dicel ohconic, as lonj;' as the 

 first and second joints united, tJie latter closely joined, swollen or 

 dilated; club 6-joiiited, all the joints, excei)t the last, transverse, the 

 last conit'al, a little more than twice tiu^ lenjith of the i)enultimate. 

 Pronot'ini i)erfectly smooth, hijjhly i)olished, the nieta]ileura with a 

 tine silvery pubescence. Abdomen oblong oval, polished, the petiole 

 short, striated. 



Habitat. — District of Columbia. 



Type in Coll. Aslnnead. 



Taken by Mr. E. A. Schwarz. 



Polygnotus astericola, s]>. nov. 



i 9 . Length, 0.80 t(> 1" ". Black, polished; heati thrice as wide as 

 thick antero-jmsteriorly, the vertex not or very faintly aciculated, the 

 face snio«>th, iM)lished. 3Iandil>les rnfo-piceous, Antennaj 10-jointed, 

 tlark brown; pedicel twice as long as thick, tirst funiclar joint minut(?, 

 pale, a little longer than thick; second larger, very little hmger than 

 the third; club 5-jointed, latlier slender, the joints about as wide as 

 long. In the S the second funicle joint is as long as the pedicel, a little 

 curved, dilated and truncate at ti]», the club (J-jointed, the joints oval- 

 moniliform, slightly pedicellate, the last cone-shaped, a little stouter 

 aud twice as long as the [>receding. Thorax ovoid, \>olished, the 

 mesonotal furrows indicated i)osteriorly, the basal tip »>f the mid<lle 

 lobe very slightly elevated, the i>arapsides with a tuft of pubescence 

 at base. Metapleura sericeous. Teguhe black. Wings hyaline, pu- 

 bescent. Legs, including coxa-, rufopiceous, the trochanters, knees, 

 tips of tibije, (the anterior tibia* almost entirely) and all tarsi, honey- 

 yellow. Abdomen not h)ng»'r than the head and thorax together, ob- 

 long oval, broader than, and not so pointed as in 7*. n'rnonin; the basal 

 segment and the foveohe on the second striated; the S abdomen shorter 

 and without row of i>unetures on the ventral segments. 



Habitat. — Ilolderness, N. II. 



Types in National Museum. 



Described from several spe«imens, reared ^lay 24, 1S84, from a Ceci- 

 domyiid gall on Aster, collected by A. Koebele. 



Polygnotus coloradensis, sp. uuv. 



S 9. Length, 1""". Black, polished ; head thrice as wide as thick 

 antero-posteriorly, the vertex very faintly, microscopically shagreeued, 

 the face smooth, highly polished, the lateral ocelli as far from the mar- 

 giu of tUe eye as to the Iroiit ocellus. Mandibles piceous-black. Au 



