418 On new Genera and Species of Hymenoptera. 



base) rufo- testaceous. Wings hyaline, with a smoky viola- 

 ceous tinge ; the costa and stigma rufo-testaceous. Abdomen 

 testaceous, the basal two thirds of the petiole (except for two 

 irregular curved marks), the base of the second segment 

 broadly (with the middle dilated), a curved line running from 

 its centre to the sides, where it becomes united to the base, 

 thus forming a large enclosed space, and similar curved lines 

 on the third, fourth, and fifth segments, but with the basal 

 lines much narrower, black ; the ventral segments are some- 

 what similarly marked, the basal two are almost entirely 

 black. 



The male is similarly coloured, but with more black on 

 the vertex behind ; the clypeus is clearly bounded by a deep 

 furrow at the sides and above and distinctly separated from 

 the eyes ; the middle is turned down on the top ; the sides of 

 the epipygium are broadly and roundly raised, in the centre 

 behind are two stout teeth, rounded behind. 



Polistes erythrocerus, sp. n. 



Niger; prothorace late, lineis 2 mesonoti, scutello, postscutello 

 lineisque 2 metanoti flavis ; abdomine late flavo balteato ; alis 

 fulvo-fumatis, stigmate nervisque fulvis. § . 



Long. 22 mm. 



Hah. Kamakura, Japan {George Lewis). 



Antennae rufous, the scape lined with black above ; the 

 third joint is slightly longer than the fourth and fifth united, 

 the last two equal in length. Head fulvous yellow ; a broad 

 band on the ocellar region, extending to the eyes and round 

 the upper part of the eye-incision, a line above and below 

 the base of the antennas, the occiput, a line above it (united 

 to the eyes by a small oblique line), black ; the part between 

 the antennas is distinctly tuberculate, the centre of the upper 

 part keeled. Front and vertex distinctly but not very closely 

 punctured. Clypeus very sparsely punctured, longer than 

 broad ; the sides of the apex oblique, the top narrowed, its 

 sides rounded, the middle roundly incised. Mandibles 

 coloured like the head, except that the teeth are black. 

 Thorax black; the prothorax (except for a triangular black 

 mark near the middle behind), two lines in the middle of the 

 mesonotum, two short ones opposite the tegulas, the scutel- 

 lum (except in the middle), its keels, the postscutellum, two 

 large lines (narrowed below) on the metanotum, and a small 

 irregular mark under the tubercles, yellow. Pro- and meso- 

 notum closely and distinctly but not deeply punctured, the 

 punctures running into reticulations ; the middle impunctate 



