THE TENTHREDINOIDEA 



91 



ocelli without ridges; antennal fovea distinct in front, merging be- 

 hind into the frontal area ; antennae longer than head and thorax, 

 rather stout, tapering slightly towards tip, third and fourth joints sub- 

 equal ; venation normal ; stigma large, regularly rounded beneath ; 

 sheath robust, rounded above and below to a rather sharply pointed tip ; 

 inner tooth of claw robust and sharp close to apex. Color black; 

 labrum white; clypeus, margin of pronotum, tegulae, apical segments 

 of tergum, venter in large part, and legs, testaceous; femora with a 

 black spot beneath ; tips of posterior tibiae and the tarsi strongly in- 

 f uscated ; wings hyaline, nervures black, the costa and stigma yel- 

 lowish. 



Two females, Berg Bay, Alaska, June 10; Sitka, June 16. 



Type no. 5289, U. S. National Museum. 



Allied to Pristiphora banksi Marlatt, but that species is much 

 smaller and more slender, the stigma is brown and the apical segments 

 of the abdomen are not pallid. 



PRISTIPHORA KOEBELI. 



Pristiphora, koebeli MARLATT, Revision of the Nematinae of North America, 

 p. 119, 1896. 



One female, Kukak Bay, July 4. 



Differs from the type in that the medial area of the abdomen is not 

 infuscated. This species was described from Washington. 



PRISTIPHORA LENA sp. nov. 



Male: Length 5.5 mm., rather slender, shining; head strongly and 

 rather closely punctured, clypeus slightly emarginate; lateral walls of 

 ocellar basin obsolete ; frontal crest strongly raised, rounded, extend- 

 ing laterally to the orbits, unbroken in the middle ; antennal fovea 

 small, shallow, rounded ; antennae nearly as long as entire body, very 

 stout at base, flattened, tapering, third and fourth joints subequal ; 

 stigma moderate, gently rounded beneath ; procidentia excavated 

 basally, strongly keeled; inner tooth of claw extremely minute, close 

 to apex. Color black ; minute spot at superior angles of pronotum, 

 tegulae, and tips of femora, testaceous; tips of coxae, trochanters, 

 tibiae except tips of posterior pair, and tarsi, white ; posterior tarsi 

 black and apices of fore and medial tarsi infuscated ; wings hyaline, 

 nervures and stigma brown. 



Two males, Sitka, June 16. 



Type no. 5293, U. S. National Museum. 



