2 IO ASHMEAD [ 2O 4] 



. Cat. No. 5752, U. S. Nat. Museum. From Alaska (U. S. 

 Coast and Geodetic Survey) ; Sherbrook, Canada (Abbe B6gin). 



In Le Naturaliste Canadien, vii, 1875, p. 264, Abbe Provancher 

 described a male insect under the name Mesostenus nigricornis which 

 he afterwards in his Fauna entomologique du Canada, 1883, corre- 

 lated incorrectly with a female under the same name. 



The name nigricornis Provancher must be retained for the male 

 which belongs to quite a different genus in a different tribe and sub- 

 family ; and the female, incorrectly correlated with it, I have here 

 named Cubocephalus nigricornis. 



Genus Xylonomus Gravenhorst. 

 XYLONOMUS FRIGIDUS Cresson. 



Xylonomus frigidus CRESSON, Trans. Am. Ent. Soc., in, p. 168, 1870. 

 PROVANCHER, Fn. du Can. Hym., p. 489, 1883. CRESSON, Syn. Hym. 

 North America, p. 220, 1887. 



Type in collection of the American Entomological Society. From 

 Fort Yukon (L. M. Turner). Originally described from Hudson Bay 

 Territory, but found throughout Canada and southward into the New 

 England States and New York. 



Subfamily TRTPHONIN^E. 

 Tribe MESOLEPTINI. 



Genus Spanoctecnus Forster. 

 SPANOCTECNUS FLAVOPICTUS sp. nov. 



Male. Length 4. i mm. Polished black ; anterior orbits, face below 

 antennas, cheeks, mandibles, front and middle coxae and trochanters, a 

 line on each side of the mesosternum, and apical margins of dorsal 

 abdominal segments 2 to 4, lemon-yellow ; hind coxa? black ; rest of 

 legs, except the first joint of trochanters above, more or less, and the 

 middle and hind femora above, more or less ; hind tibiae at apex and 

 their tarsi, which are fuscous, red. Wings hyaline, the stigma and 

 veins light brown, the tegulae yellowish-white. 



Type. Cat. No. 5628, U. S. Nat. Museum. From Unalaska, Sep- 

 tember 17 (Fur Seal Commission). One specimen. 



Genus Eclytus Holmgren. 

 ECLYTUS YAKUTATENSIS sp. nov. 



Male. Length 5 mm. Polished black ; orbits opposite antennas, 

 the face below, including the cheeks and mandibles, except a tridentate 

 (pi) black mark just beneath the insertion of antennae, and the front 



