162 ASHMEAD 



Genus Cratichneumon Thomson. 



This genus, not hitherto reported from North America, is repre- 

 sented in Alaska by five species, all new, distinguishable as follows : 



TABLE OF SPECIES. 



Mostly rufous or ferruginous, or at least with mesonotum or scutel- 

 lum rufous 3 



Mostly black, or head and thorax black. 



Abdomen mostly rufous or ferruginous 2 



Abdomen entirely black. 



Face below antennas, spot on orbits at summit of eyes, and line oppo- 

 site insertions of antennae, white ; legs ferruginous, with coxae, first 

 joint of trochanters, hind femora, and apices of their tibiae black. 

 Male C. alasketisis. 



2. Face and antennae wholly black ; abdomen at apex black, segments I to 

 3 and 4 except at apex, red ; legs black, with apices of anterior and 

 middle femora, their tibiae and tarsi and hind tibiae, except at apex, 



and their tarsi, reddish-yellow. Male C. kodiakensis. 



Face below antennae, anterior orbits, dot at summit of eyes, scape be- 

 neath, tegulae, an abbreviated line in front of them, the tibial spurs, 

 and front and middle coxa? and trochanters, ivory or yellowish-white ; 

 flagellum, except above, rest of legs, except first joint of hind tro- 

 chanters and hind tarsi, which are fuscous, and abdomen, except the 

 first segment, rufous or ferruginous. Male C. yakutatensis. 



3. Mostly rufous or ferruginous 4 



Mostly black, with mesonotum, scutellum and abdomen, except first 

 segment, more or less basally, rufous, rarely with the metathorax 

 marked with rufous ; face, below antennae, scape beneath, palpi, a 

 short line on upper margin of prothorax in front tegulae, a spot vis-a- 

 vis on lower margin, front coxae and trochanters, yellowish-white. 



C. confusus. 



4. Thoracic sutures strongly marked with black. 



Metathorax entirely black ; flagellum incrassated, black, with a yellowish 

 annulus near the middle, the first three joints only a little longer than 

 thick, those beyond transverse ; legs and abdomen, except most of the 

 petiole, rufous. Female C. popofensis. 



Metathorax rufous ; face below antennae, orbits, scape beneath and 

 front coxae beneath, yellowish-white ; legs, except front trochanters, 

 middle coxae and trochanters, more or less, apices of hind coxae, first 

 joint of their trochanters, extreme apex of their femora, tips of hind 

 tibiae and their tarsi, which are blackish or fuscous, red ; abdomen 

 entirely red. Male C. popofeusis. 



