[151] HYMENOPTERA 157 



along anterior margin, metathorax anteriorly and beneath, including 

 metasternum and lower half of metapleura, and a band at base of 

 second, third and fourth abdominal segments, black.../, brevipennis. 



1 1. Face below antennae and scape beneath yellow. 



Thorax mostly black, the mesonotum and the scutellum rufous ; legs, 

 except the hind tarsi and the front coxae and tarsi, ferruginous, the 

 hind tarsi fuscous, the front coxse and tarsi pale yellowish or yellow- 

 ish-white /. brevipennis. 



ICHNEUMON IMITATOR sp. nov. 



Male. Length 10.5 to n mm. Black and shining but punctate; 

 mandibles rufo-piceous ; palpi fuscous ; tegulae and the epitegulae tes- 

 taceous ; legs, except the claws, pulvilli and hind tarsi, which are black 

 or fuscous, red. Wings subfuliginous, the stigma except medially, and 

 the veins brown-black, the stigma medially being testaceous. The 

 antennae are ^y-jointed and extend to beyond the middle of the abdo- 

 men, tapering off to a point at apex, the joints after the eighth being 

 more or less nodose beneath. The pubescence on the face, mandibles, 

 and sides of the thorax is whitish, that on the vertex of the head, the 

 mesonotum, and the scutellum being more or less fuscous, although 

 there are some whitish hairs intermixed with it. The metathoracic 

 areola is large, quadrate, a little longer than wide, the basal lateral 

 and the median lateral areas being confluent. The wing venation is 

 normal, the submedian cell a little longer than the median, the disco- 

 cubital nervure broken by a stump of a vein very near its middle, the 

 areolet irregularly pentagonal, the transverse cubiti converging above, 

 the upper face formed by them, or the part represented by the second 

 abscissa of the radius, being much the shortest face of the five; 

 the second recurrent nervure joins the areolet much beyond its middle, 

 while the transverse median nervure in the hind wings is nearly 

 straight, but broken by the subdiscoidal nervure below the middle or 

 at about its basal third. The abdomen is elongate, nearly twice as 

 long as the head and thorax united, black except the venter, which is 

 more or less dark rufous, the ventral segments 2 to 5 with a distinct 

 fold ; the petiole, except a narrow, smooth, shining spot at the extreme 

 apex, is finely rugulose, the second and following segments are coria- 

 ceous, the second and third segments being also more or less punctate 

 basally, the second with some irregular elevated lines extending into 

 the gastrocoali and some finer elevated lines extending from them. 



Type. Cat. No. 5534, U. S. Nat. Museum. From Sitka, June 16 ; 

 Juneau, July 25. Two specimens. The species, except in the color 



