184 liULLETlN 45, UNITED STATES NATIONAL MUSEUM, 



tli«' eyes, striated. Antenna' 12-jointe(l, Itrowii-bltick, longer (lian the 

 body. Mesonotuni sniootli, -shining", with two furrows and a few scat- 

 tered punctures; nii(hlle spines of postscutelhini twice as h)n<>- and 

 much stouter tluiu the lateral spines, curved and rather blunt at apex ; 

 nietathorax with prominent angles. Abdomen black, shining, striated. 

 Wings hyaline, inibescent, the marginal vein six times as long as the 

 short stigmal. Legs rufous, the cox;e black. 



Habitat. — Arlington, Va. 



Tyi)e in Coll. Ashmead. 



]Jescribed from a single specimen, which is readily distinguished 

 from T. amcrictoia by the rugosity of the vertex, collar, and scutellnm. 



XENOMERUS Walker. 



Knt. Mui;., in, p. lim (1836). 



(Type A. irgenna Walk., g ; Teltax iiialaii Walk., 9.) 



(PI. VIII, Fig. 3, S.) 



Head large, transverse, broader than the thorax, the occiput slightly 

 emarginated, with a delicate margin; ocelli three in a triangle, the 

 lateral away from the margin of the eye; eyes rounded, pubescent. 



Antennic 12-jointed in both ^sexes, inserted on the clypeus, in 9 

 termiiuitingin a 5- or O- jointed club, in S pedicellate-nodose, with whorls 

 of long hairs. 



Maxillary palpi 3-jointed. 



Mandibles bidentate. 



Front wings as in Tehas, with a long marginal vein and a short 

 stigmal. 



Abdomen broadly oval, the tirst and second segments short, the first 

 about twice as wide as long, both striated, the third segnuMit large, 

 the following very sliort. 



Legs long, slender, pubescent; the tibial spurs weak, the tarsi long, 

 slender; the basal Joint of the hind tarsi more than twice as long as 

 the second; claws simple. 



The genus is readily distinguished in the male sex by the verticillate 

 antenna', and in tlie female from Tele(U\ Prosacatitha, and allie<l genera 

 by having distinct mesonotal furrows; from 7'>'/.v.s7/('aMY/<a, which also 

 has mesonotal furrows, it is distinguished by having a single post- 

 scutellar spine. 



Xenomerus pallidipes, s]i. iiov. 



9. Length, 1.4' Polished black, shining, sparsely pubescent; 



head transverse, with the eyes slightly wider tlian the thorax, the lat- 

 ter slightly pubes(;ent. 



Antenna' 12 jointed, clavate, the <'lub G-jointed, the scape pale'brown, 

 the tlagellum black; the pedicel is shorter than the tirst funiclar joint; 

 the tirst and second funi(?lar joints longer than thick, the third and 

 fourth small, transverse; club joints, except the last, transverse. 



