14 PROCEEDINGS OF THE NATIONAL. MUSEUM. vol. CI. 



Ty])e locality. — Alpine region of Mount Washington, New Hamp- 

 shire. 



Type.—Q^i. No. 25018, U.S.N.M. 

 One male from Mrs. Annie T. Slosson. 



(EXOLYTUS GRANDIS Ashmead MS.)=ATRACTODES GRANDIS Cushinan. 

 (HADRODACTYLUS AFFINIS Ashmead MS.)=ALEXETER RIPARIUS (Davis). 

 HEMITELES (ISDROMAS) WASHINGTONENSIS. new species. 



" Stiboscoms tvashingtonensis Aslira., n. sp.," Slosson, Ent. News, vol. 17, 

 1906, p. 324. 



Closely related to the so-called genotype, Acrolyta {Isdromas) 

 aletiae Ashmead, but more slender and at once distinguishable by 

 the black hind coxae and the white front and middle coxae and 

 trochanters. 



Female. — Length, 3.5 mm.; antennae, 3 mm. 



Head polished, face opaque shagreened ; temples convexly sloping ; 

 occiput shallowly concave ; eyes parallel within ; clypeus weakly sepa- 

 rated, opaque, apex narrowly impressed, the impression polished, 

 broadly truncate; malar space as long as basal width of mandible; 

 mandibles not swollen toward base ; antennae slender, thickened be- 

 yond middle and attenuate toward apex, first two flagellar joints 

 slender and subequal, third slightly shorter; thorax opaque, sha- 

 greened above, polished laterally with more or less obscure acicula- 

 tions, sternum subopaque; notauli and sternauli strong anteriorly; 

 propodeum subpolished, more or less roughened, transverse carinae 

 and apical abscissae of longitudinal carinae distinct, area between 

 transverse carinae longitudinally striate ; legs rather slender, areolet 

 pentagonal in position with second intercubitus indicated by thicken- 

 ings in radius and cubitus ; nervulus postf ureal and inclivous ; nervel 

 lus broken beloAV middle, inclivous; first two tergites longitudinallj 

 striate, others polished; first tergite with sides divergent, straight 

 more than twice as long as wide at apex, spiracles slightly beyond 

 middle; second with distinct, pale, rounded thyridia; second and 

 third indistinctly transversely impressed before apex; ovipositor 

 sheath slightly longer than first tergite, subangulate above at apical 

 third. 



Black; mouth parts, tegulae, wing-bases, front and middle coxae 

 and trochanters white; hind coxae black, trochanters white with a 

 piceous spot above on basal joint ; all femora testaceous with a brown- 

 ish stain above toward base ; tibiae and tarsi more or less inf uscate, 

 hind tibia rather distinctly annulated ; calcaria white ; wings hyaline, 

 venation brown, stigma paler; all tergites narrowly margined with 

 whitish apically ; sheath blackish. 



Type locality.— M^mQ region of Mount Washington, New Hamp- 

 shire. 



