NO. 1777. ON JAPANESE 8AWFLIES—R0HWER. 105 



the lateral ones below the supraorbital line ; antennae claA^ate, with five 

 joints before the gradually formed club, the third much the longest, 

 club with two distinct joints and a very indistinctly defined one; 

 maxillary palpi six-jointed, labial palpi four-jointed; first perapteron 

 smaller than in Cimbex; femora robust without spines ; coxse contig- 

 uous; tarsal claws cleft; basal plate deeply, arcuately emarginate 

 posteriorly; wings similar to Cimhex except the cross- vein in the anal 

 cell is much nearer the base of the wing. 



Belongs to Cimbicinse and is related to Cimhex olivier, but may be 

 easily distinguished from that genus by the contiguous coxae, and 

 the posterior orbits not extending beyond the eyes. 



ABIA RELATIVA, new species. 



Related to Ahia japonica Cameron, but difi^ers from the description 

 of that species in not having a pad-like elevation on the vertex, and 

 only the tarsi are white. 



Female. — Length 1 5 mm. Lab rum concealed ; clypeus broadly arcu- 

 ately emarginate; frons large, the ridges forming a large basin which 

 incloses the anterior ocellus; a distinct furrow from the anterior 

 ocellus to the occiput; third antennal joint long and slender, nearly 

 as long as the following joints; head sparsely punctured; thorax with 

 distinct, separate punctures; inner claw tooth as long as outer; 

 transverse radius basad of middle of the third cubital cell; first 

 transverse cubitus wanting; abdomen normal. Head, legs and most 

 of the abdomen dull black; thorax and basal segment of abdomen 

 dark green; antennae entirely black; head, legs, pectus, and anterior 

 part of the scutellum with black hair; mesonotum and pleurae with 

 fulvous hair; all the tarsi yellowish- white. Wings yellowish-hyaline, 

 apical margin, a small spot around stigma and the first discoidal 

 cell distinctly dusky; venation basally yellowish, apically brown; 

 stigma at base brown, at apex yellowish. 



Male. — Length about 11 mm. Differs from the female in the 

 usual sexual characters, and in the hair being almost entirely black, 

 that of the mesonotum having a faint fulvous tinge; the apex of 

 the club beneath is reddish. Ilypopygidium is truncate at the apex. 



Type-locality. — Japan. One female collected by Mr. Koebele. 



Type.—Csit. No. 13319, U.S.N.M. 



Family TENTHREDINID^. 



PACHYNEMATUS ALNI, new species. 



Runs in Konow's revision of the Palsearetic Pachynemati" to the 

 German species ravidus Konow, but does not seem very close to that 

 species. The entirely black pronotum will distinguish it at once. 



Male. — Length 6 mm. Anterior margin of the cl3q)eus deeply, 

 rather nafrowly emarginate, the lobes broad and obtusely rounded 



aZeit. Hym. Dipt., vol. 3, 1903. 



