116 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.39. 



gentalia stipes large, apex rounded. Black: a small spot at base of 

 mandibles within, metaepisternum, a broad band on the first and 

 fifth segments of the abdomen straw yellow; legs black, all the tibiae 

 and tarsi beneath reddish yellow ; gentalia brownish. Wings hyaline, 

 basal half and cubital and radial areas of the anterior wings brown; 

 venation black, stigma yellow. 



TyjJe-locality. — Hakone, Japan. One male from Mr. Matsumura, 

 No. 47, July 27. 



Type.— Csit. No. 13333, U.S.N.M. 



The species of Jermakia may be separated by the following table: 



Mostly luteous; "abdomine pallida-testaceo " spinifera Mocsary. 



Mostly black 1. 



1. Base of antennae ferriginous; lateral margins of the first segment yellow. 



cephalates Jakowlew. 

 Antennae black; first dorsal segment all yellow japonica Rohwer. 



TENTHREDINA, new genus. 



Type of genus. — Tenthredo Jlavida Marlatt. 



In habitus much like Dipteromorplia W. F. Kirby, but that genus 

 has a nearly truncate clypeus, the head narrowed beliind the eyes, 

 the dilated frons of Tenthredella, and the transverse median nearly 

 interstitial with the basal vein. 



Large species; labrum large; clypeus deeply emarginate, separated 

 from the front by a suture ; no large dilated frons above the antennae 

 as in Tenthredella; lateral ocelli below the supraorbital hne ; eyes large, 

 strongly converging to the clypeus; malar space wanting; maxillary- 

 palpi six jointed, labial-palpi five jointed; antennae nine jointed, the 

 third joint longer than the fourth, pedicellum much longer than broad ; 

 metathorax short ; the first segment closely attached to the metatho- 

 rax, with a longitudinal suture; abdomen rather narrowed basally; 

 tarsal claws cleft ; posterior coxae rather large but not so long that the 

 femora extend to the apex of the abdomen; legs hairy; wings large, 

 third cubital cell longer than the first and second ; transverse median 

 received in the basal tliird of the cell; intercostal vein wanting; two 

 discal cells in the hind wings, anal cell usually shorter than the sub- 

 median, and petiolate.^ 



In F. W. Konow's tables in the Genera Insectorum this genus runs 

 to Tenthredo (now Tenthredella), but will be at once separated by the 

 absence of antennal frons, cylindrical abdomen, and the first segment 

 of the abdomen wider than the second. It may be that when the 

 Tenthredininae of the Orient are better known that this will be re- 

 stricted to a subgenus of Tenthredella., but at present it seems distinct. 



o This character is subject to variation within a species. In one specimen of Ten- 

 thredo Jlavida, the hind wings on the right-hand side of the specimen, the anal cell is 

 distinctly petiolate, while the left-hand wing has the anal cell nearly sessile. 



