NO. 1157. JAPANESE HYMENOPTERA—MARLATT. 501 



19. TENTHREDO PLATYCERUS, new species. 



Female. — Length, 15 mm.; expanse, 28 mm.; rather robust, thorax 

 and abdomen of about equal width, the latter scarcely at all narrowed 

 basally; clypeus very narrowly and acutely notched at center, lobes 

 very broad, rounded; antennae long, much longer than head and 

 thorax; flagellum slightly compressed centrally, joints 3 and 4 sub- 

 equal ; claws very broad, rays nearly equal, parallel. Color, light tawny 

 yellow ; autennal joints 5 to 8 for the most part, large spot on vortex, 

 spot on each of the three anterior lobes of mesonotum, small si)ot just 

 above basal plates, triangular area on dorsal segments 3 to 7, black; 

 plurai, pectus, and coxse for the most part, and posterior femora, 

 black; a few dark spots on the venter of abdomen; wings nearly 

 hyaline, slightly yellowish ; costa and stigma yellow, other veins for the 

 most part dark brown. 



Male. — The male agrees with the female except that the antenna? are 

 longer, sometimes nearly as long as the body and distinctly compressed, 

 and the hind femora are reddish yellow, with more or less of the sides 

 infuscated. The black spot on the metanotum is also wanting; the 

 antennai are sometimes almost entirely yellow. 



Type.— 'So. 3832, U.S.N.M. 



Described from nine specimens, of which seven are males. (Gifu 

 zuzushi and woods), (No. 14). 



20. TENTHREDO PROVIDENS Smith. 



Tenthredo providens Smitxi, Trans. Ent. Soc. Lond., 1874, p. 382, female. 

 Tenthredo providens Kirhy, List Hym. Brit. Mus., 1882, 1, p. 304, female. 



Eepresented by seven specimens, five of which are females. (Gifu 

 and Ibuki), (No. 16). 



21. TENTHREDO MORTIVAGA, new species. 



Female. — Length, 12 mm. ; expanse, 23 mm. ; head wider than thorax, 

 abdomen noticeably constricted basally; clypeus broadly and not very 

 deeply emarginate, lobes somewhat pointed at outer angles; antenna} 

 shorter than head and thorax, third joint nearly twice as long as fourth; 

 inner tooth of claw very close to outer, parallel with it. Colors, black 

 and yellowish- white; transverse band between compound eyes, includ- 

 ing bases of antenme, the clypeus, labrum, and month parts, large 

 spot on the cheeks, angles of pronotura, teguke, scutellum, with post- 

 scutellum, scutum, and wider margins of basal plates, narrow edge of 

 abdomen above and most of venter, very light yellowish, almost white; 

 legs and antenna? except basal joint yellowish brown; the anterior 

 and middle femora very light yellowish, almost white; posterior femora 

 marked with black on the inner and upper edges; segments of the 

 abdomen above, from the fourth outward, reddish; coxje black, except 

 at apex; pleura? and pectus, black; wings nearly hyaline, slightly 



