AMERICAN IIYMENOPTER.A. 107 



1p2;s ferruginous, with only the apex of tibiro and their tarsi diiglcy; ah<loniiMi 

 subpetiolated ; venter white, banded with black. Length .'> lines. 



Var. 9- — Face, mesothorax, pleura and metathorax .black, immaculate. 

 Length -IJ lines. 



Ilab. — Mass., Del. Quite distinct from vnlrjnrls by the subpetio- 

 lated abdomen and differently colored posterior logs. 



XORIDES, Grav. 

 Xorides borealis, n. sp. — 9- — Black; narrow anterior orbits, palpi, tegulai 

 and lower margin of protliorax white; wings hyaline; anterior legs whitish, 

 yellowish behind, four posterior coxa; and trochanters, and intermediate femora, 

 pale ferruginous; intermediate tibioe and tarsi dusky, posterior femora, tibire 

 and tarsi black; base of their tibife narrowly white ; incisures of abdominal 

 segments more or less whitish ; venter banded with white; ovipositor as long 

 as abdomen. Length 5 lines. 



Hub. — Hudson's Bay Territory. 



EUXORIDES, n. gen. 



Closely resembles Xoru/cs, from which it is at once distinguished 

 by the anterior wing having a triangular, subpetiolated arcolet ; the 

 head is more transverse, being less broad behind the eyes; the face 

 wider beneath ; and the posterior legs proportionally shorter and more 

 robust. 



Euxorides americanus, n. sp. — 9- — Black, opaque; palpi, scape beneath, 

 lower margin ofiiruthorax, tegulfe and spot before, white; clypeus and niamli- 

 bles rufi)-piceous; metathorax finely riigulose, channelled centrally and witii 

 short glittering pile laterally; wings hyaline, iridescent ; anterior coxse and 

 legs white, their femora yellowish behind ; four posterior legs, including coxjp, 

 honey-yellow, tips of intermediate coxse, trochanters, knees, tibiae, apical half 

 of posterior trochanters and their knees, whitish ; intermediate tarsi, base of 

 l)osterior trochanters, their femora at base and before apex, their tibise except 

 base ami their tarsi, black ; abdomen convex, somewhat shining, incisures of 

 the segments whitish; venter more or less whitish ; ovipositor shorter than 

 abdomen. Length 4J lines. 



Ilab. — Conn , Penn.. Texas. 



XYLONOMUS, Grav. 

 Abdomen entirely black. 



Prothorax above with a [)rominent lateral tubercle. 



Wings with a fuscous band 1. australis, n. sj). 



Wings entirely hyaline 2. humeralis, Say. 



Prothorax siini)lc. 



Legs entirely black ?,. cincticornis. Cress. 



Legs black, base of tibife and of tarsi white \. stigmapterus. Sav. 



Four anterior legs and posterior coxas ferruginous .j. frigidus, n. sp. 



Abdomen wi;h lateral white spots 6. albopictus, n. sp. 



1. Xylonomas australis, n. sp. — 9- — Large, black, opaque ; head piceous or 

 rufo-piceous, face densely rugulose, vertex and ciieeks smooth, shining, with 

 scattered punctures; mouth black; antennas long, slender, black, with a broad 

 white annulus beyond the middle: tliorax rough and uneven, tiiyged with 



