[349] THE TENTHREDINOIDEA 89 



of abdomen, and the tarsi, testaceous, the last more or less mfuscated 

 at tip ; wings hyaline, nervures brown, costa and stigma yellow. 



One female, Popof Island, July 13. 



Type no. 5288, U. S. National Museum. 



Allied to Pachynematus apicalis Marlatt, but in that species the 

 walls of the ocellar basin are present, the antenna 1 fovea is developed, 

 and the second recurrent nervure is interstitial with the second cubital. 



SYNOPSIS OF PRECEDING SPECIES OF PACHYNEMATUS. 



Females. 



Sheath very large and projecting ocreatus Harrington. 



Sheath normal. 



Head black orarius sp. nov. 



Head mostly yellow. 

 Venation normal. 



Antennae yellow oronus sp. nov. 



Antennae black .pleuricus Norton. 



Second recurrent interstitial affinis Marlatt. 



Males. 

 Venation normal. 



Hypopygium entirely pale, third joint of antennas much shorter 



than the fourth pleuricus Norton. 



Hypopygium pale at apex, third joint of antenna? but slightly 



shorter than fourth gotarus sp. nov. 



Second recurrent interstitial affinis Marlatt. 



PRISTIPHORA ORTINGA sp. nov. 



Female: Length 5 mm., smooth and shining; head strongly, but 

 sparsely punctured; vertex smooth, shining, entirely free from ridges; 

 clypeus squarely truncate; antennal fovea indistinct shallow, punc- 

 tured, merging posteriorly into the frontal area behind; antennas 

 short, third joint longer than fourth or fifth which are subequal ; first 

 cubital vein wanting; outer veins of discal cells in hind wings inter- 

 stitial ; sheath blunt at tip, rounded above and below ; cerci minute ; 

 stigma narrow, broadest at base, tapering to apex ; inner tooth of 

 claw extremely minute. Color black; trochanters, tips of anterior 

 and middle femora, tibiae except tips of posterior pair, and the tarsi 

 for the most part, testaceous ; wings hyaline, nervures and stigma pale- 

 brown, costa hyaline. 



One female, Kukak Bay, July 4, 1899. 



Type no. 5290, U. S. National Museum. 



Allied to Pristiphora sycophant a Walsh, but in that species the 

 antennal fovea is small and deep, faint ridges are present in front of 



