[357] THE TENTHREDINOIDBA 97 



Pectus black. 



Sheath acutely pointed .peninsularis sp. nov. 



Sheath rounded at tip. 



Clypeus shallowly emarginate .glinka sp. nov. 



Clypeus deeply notched islandica sp. nov. 



Males. 



Head black tundra sp. nov. 



Head black with narrow yellow orbits .glinka sp. nov. 



Head yellow .popofiana sp. nov. 



PTERONUS SHUMAGENSIS sp. nov. 



Female: Length 6.5 to 8 mm.; robust, shining; clypeus not very 

 widely, but deeply emarginate, lobes rounded; ocellar basin distinctly 

 defined, lateral walls sharply raised; frontal crest strong, bitubercu- 

 late, notched in the middle ; antennal fovea elongate, deeply incised ; 

 antennae as long as head and thorax, slender, third to fifth joints 

 subequal ; second recurrent nervure interstitial with the second cubi- 

 tal ; stigma narrow, rounded at base and tapering to apex ; sheath 

 rather sharply pointed at tip, rounded below, almost straight above ; 

 cerci robust, reaching tip of sheath ; claws deeply and evenly cleft. 

 Color reddish yellow ; two basal joints of antennae, flagellum above, 

 spot surrounding ocelli, spots on lateral lobes of mesonotum, spot 

 on middle lobe of mesonotum, absent in some specimens, apex of 

 scutellum in some specimens, tergum of abdomen, except apical seg- 

 ment, black ; tips of tarsi infuscated ; wings hyaline ; nervures brown, 

 except costa and stigma, which are yellowish. 



Four females, Popof Island, July 9-12, 1899. 



Type no. 5303, U. S. National Museum. 



PTERONUS ZEBRATUS sp. nov. 



Female : Length 6 mm. ; slender, shining ; head narrowed behind 

 compound eyes, somewhat roughened ; clypeus shallowly and not 

 very broadly emarginate ; sides of ocellar basin distinct, but rounded ; 

 frontal crest strongly and sharply raised, curved forward, unbroken; 

 antennal fovea minute, indistinct; antenna? considerably longer than 

 head and thorax, very slender, scarcely tapering, third joint slightly 

 shorter than fourth ; venation normal ; stigma gently rounded below ; 

 sheath blunt at apex, obliquely truncate, upper margin nearly straight; 

 cerci short, stout; claws shallowly cleft, rays subequal. Color of 

 dorsulum black ; antennae pale beneath ; broad inner and outer orbits, 

 pronotum, tegulas, sutures of mesonotum, anterior half of scutellum, 



