HYMENOPTERA 203 



2. Legs rufous with the hind tibiae and tarsi black, the middle tarsi fus- 

 cous, the apices of joints i to 4 yellowish ; cljpeus with the an- 

 terior margin testaceous; mandibles rufo-piceous with a large jel- 



lowish-white spot at base C. alaskeftsis. 



Legs rufous, with the hind femora toward apex and their tibiae and 

 tarsi black, the apex of the middle tibije and tarsi subfuscous ; 

 cljpeus wholly black; mandibles yellowish-white with black teeth. 



C. nigricorms 

 {^:^ JSc/ithrus nigricornis Provancher, part). 



CUBOCEPHALUS ATROCOXALIS sp. nov. 



Female. — Length 8 to 10 mm. ; ovipositor about two thirds the 

 length of the abdomen. Black, very finely, closely punctate ; man- 

 dibles, except teeth, and legs, except coxse, hind tibise and tarsi 

 red ; palpi yellov^^ish ; tegulse, epitegulae and apices of ventral segments 

 I to 3 yellowish-white. Wings subhyaline, the stigma and veins black, 

 the areolet oblique, rhomboidal. Claws pectinate. Metathoracic 

 areola partly formed but confluent with the petiolar area. 



Type.— Cat. No. 5626, U. S. Nat. Museum. From Alaska (U. S. 

 Coast and Geodetic Survey). Exact locality unknown. Easton, 

 Washington (Albert Koebele) . 



CUBOCEPHALUS ALASKENSIS sp. nov. 



JFeffia/e. — Length 7-8 mm. Agrees well with C. atrocoxalis., ex- 

 cept that all the coxce are red, the hind tibiae and tarsi black, the 

 middle tarsi more or less fuscous with the tips of the joints yellowish, 

 the anterior margin of the clypeus and scape at apex narrowly, are 

 testaceous ; wings clear hyaline ; while the four apical segments of the 

 abdomen are almost smooth, shining. 



Type. — Cat. No. 5627, U. S. Nat. Museum. Alaska. 



CUBOCEPHALUS NIGRICORNIS sp. nov. 



Echthriis nigricomis Provancher {partim), Faun. ent. du Can., il, p. 803, $ 

 {}tec. (J', p. 486), 1883. — Cresson, Syn. Hym. North America, p. 221 

 (part), 1887. 



Cryptiis or Phygadawji species Davis, Proc. Acad. Nat. Sci. Phila., p. 190 

 (part), 1894. 



Female. — Length 7.5 to 8 mm. Agrees in stature and color fairly 

 well with C. alaskensis^ except that the clypeus is entirely black, not 

 testaceous anteriorly, the apex of the hind femora and their tibias and 

 tarsi are wholly black, the abdomen with a very fine alutaceous or 

 coriaceous sculpture, while the areolet in the front wings is usually very 

 irregularly pentagonal, although sometimes subrhomboidal or oblique 

 as in the other species. 



