2o6 ASHMEAD 



middle and hind legs, except the hind tarsi which are black or fuscous, 

 reddish-brown ; abdomen black with the apices of dorsal segments 2 

 and 3 narrowly yellowish ; antennae except the ring-joint, entirely 

 black. Wings hyaline, the stigma and veins brown black, the disco- 

 cubital vein broken by a slight stump of a vein before its middle, the 

 areolet oblique, petiolate, receiving the second recurrent nervure near 

 its apex. Scutellum longitudinally striate. Metathorax bidentate or 

 bispined, the upper hind angles being produced into a long tooth or 

 spine, the areola elongate, about thrice as long as wide. Abdomen 

 twice longer than the head and thorax united, the petiole very long 

 and slender, as long as segments 2 and 3 united, very slightly curved 

 at apex as seen from the side, coriaceous, the spiracles situated at the 

 basal third. 



Type. — Cat. No. 5630, U. S. Nat. Museum. From Sitka, June 

 16. One specimen. 



Genus Gausocentrus Forster. 



Mr. Davis^ has incorrectly placed in this genus Mesoleptus strigosus 

 Cresson. The type of this species, No. 1604 (Belfrage Collection) 

 is in the National Museum and a careful study of it shows that it is a 

 Cryptine and not a Tryphonine, and in reality represents the male of 

 Mesostenus longicaudus Cresson, a species which should be placed in 

 the genus Nematopodius Gravenhorst, in my tribe Mesostenini. 

 Nematopodius longicaudus Cresson is found from Texas to Canada 

 and will doubtless be found to occur in Alaska. 



Genus Hypocryptus Forster. 

 This genus is here recognized in our fauna for the first time. 



TABLE OF SPECIES. 



1. Head and thorax mostly black. 



Abdomen more or less rufous, or with the middle segments 

 rufous 4. 



Abdomen mostly black, none of the segments wholly rufous, 

 although sometimes apically or medially striped or banded 

 with rufous 2 . 



2. Abdomen with a rufous stripe extending from base of second 



dorsal segment clear to the apex, dilated posteriorly and leaving 

 the sides of the segment alone black 3. 



'Trans. Amer. Ent. Soc, xxiv, p. 311, 1897. 



