204 



ASHMEAD 



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

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



In Le Naturaliste Canadien, vii, 1S75, 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 Cabocephalus nigricornis. 



Genus Xylonomus Gravenhorst. 

 XYLONOMUS FRIGIDUS Cresson. 



Xylonomus frigidus Cresson, Trans. Am. Ent. Soc, iii, p. 168, 1870. — 

 Provancher, Fn. du Can. Hym., p. 489, 1883. — Cresson, Syn. Hym. 

 North America, p. 220, 1887. 



Type in collection of the Amei'ican 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 TRTPHONINv^. 



Tribe MESOLEPTINI. 



Genus Spanoctecnus Forster. 



SPANOCTECNUS FLAVOPICTUS sp. nov. 



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



antennae, cheeks, mandibles, front and middle coxje and trochanters, a 



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



abdominal segments 2 to 4, lemon-yellow ; hind coxae 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 antennae, 



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



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



