380 W. H. ASHMKAD. 



% . — Leugth 3.5 mm. Tip.s of femora, tibijE at base and apex, and the stria, 

 brownish yellow, antenna; black, tlie scape dilated beneath, not lonjier than tlie 

 first flagellar joint, punctate above, smooth beneath ; all flagellar joints fluted 

 and pediceilated at apex, pilose, the first joint twice as long as the second, the 

 following very nearly equal with the secon(k Abdomen with a very stout, 

 coarsely rugose petiole, which is as long as the hind coxfe and thicker at base 

 than at apex ; segments 3, 4 and 5 about equal, the following very short. 



Hab. — Montana and Colorado. Types in coll. American Ento- 

 mological Society. 



Isosoiiia iievadense sp. n. 



%. — Length 5 mm. Black; scape and legs, except coxse, brownish yellow, 

 tarsi paler. Antennae short ; scape cylindrical, twice the length of the first fu- 

 nicular joint: joints of funicle very briefly pediceilated at apex, the first only a 

 little longer than the second, the others subequal, about twice as long as thick, 

 the whorls of hair short and sparse ; hind coxae long, conical, shagreened ; meta- 

 tborax coarsely rugose; wings hyaline, the nervures light brown, the marginal 

 one and a half times as long as the stigmal, the latter ending in a knob with an 

 uncus; postmarginal a little longer than the stigmal. Abdomen ovate, as long 

 as the thorax, piceous beneath, the fourth segment as long as the fifth and sixth 

 united ; petiole long, rugose, longer than the hind coxae, more than four times 

 as loug as thick. 



Hab. — Nevadii. Type in coll. American Entomological Society. 



ISOKOMORPHA Ashmead. 



1888. — Entom. Amer. vol. iv, p. A2 (June). 



(Type /. europiB.) 



iMOsoiiiorpliM eiirupa? sp. n. 



9. — Length 4.5 mm. Black, finely rugulose; scape, mandibles, venation, a 

 spot on anterior angles of pronotum, trochanters, tips of femora, the tibiae, ex- 

 cept hind pair, and all tarsi, brownish yellow. Head as wide as the mesonotum, 

 viewed from in front, subtriangular, viewed from above, quadrate, the vertex 

 slightly impressed and the impression extending into a deep frontal furrow 

 whose sides are sloping, the anterior ocellus being placed directly in this furrow ; 

 antennae 10-jointed, the flagellum pubescent, the first joint the longest, about 

 twice as long as the pedicel, the following joints subequal, the club oblong, 3- 

 jointed. Thorax elongated, the pronotum transverse-quadrate, not quite as long 

 as the mesonotum; the latter with well-defined parapsides; scutellum a little 

 longer than the middle lobe of mesonotum; nietathorax quadrate, squarely 

 truncate behind, the superior edge of the trur.cature distinctly margined, the 

 dorsum distinctly longitudinally striated ; wings hyaline, the marginal vein a 

 little longer than the stigmal. Abdomen ovate, two-thirds the length of thorax, 

 with an exceedingly short, rugose petiole, the body segments all very nearly 

 equal in length, except the first, which is fully as long as the second and third 

 united, and one of the characters distinguishing the genus. 



Hab. — Lille, France. Type in coll. Ashmead. 



