1892.] NATURAL SCIENCES OF PHILADELPHIA. 133 



REPORT ON THE HYMENOPTERA COLLECTED IN WEST GREENLAND. 



BY WILLIAM J. FOX. 



The Hymenoptera enumerated in the present paper were col- 

 lected by Messrs. Mengel and Hughes, Avho accompanied the 

 Academy's recent expedition to West Greenland. The larger por- 

 tion of the collection was made at Disco Island, in lat. 69° 10' 

 and at McCormick Bay, Lat. 77° 40' while Herbert Island, Lat. 

 77° 30' contributes one specimen. The species of XemaUis de- 

 scribed below was forwarded to Mr. C. L. Marlatt of the U. S. De- 

 partment of Agriculture, a specialist to whom I am indebted for 

 the description. My thanks are due Prof. Angelo Heilprin and lo 

 Mr. E. T. Cresson for the opportunity of studying the collection. 



TEREBRANTIA. 



Nematus borealis Marlatt, n. sp. 



S — Black, including the tegulffi and trophi ; labrum, tip of abdo- 

 men, tips of femora, tibise, tarsi except tips and posterior pair dull 

 yellowish or resinous. Antennae moderately long and slightly 

 flattened; joints three to five, nearly equal ; all coarsely punctured 

 and faintly pubescent. Head more angular than is commonly the 

 case in Xematus and resembling in this respect the genus Dolenis 

 and in Nematus, N. concolor and particularly yapax ; when viewed 

 from above, sloping regularly and considerably posteriorly ; 

 sparsely pubescent ; region including ocelli abruptly elevated or 

 shield-shaped — the posterior ocelli on border of shield and the 

 anterior ocellus in the wide basin of the shield ; clypeus slightly 

 emarginate, shining. Scutellum and lateral lobes of the mesothorax 

 shining. Abdomen with central longitudinal ridge above on pos- 

 terior half Wings perfectly hyaline, veins dark-brown, including 

 costal to base ; stigma large, yellow ; second submarginal cell uni- 

 form in width, i. e., not especially widened at first angle ; distan( e of 

 first recurrent nervure from base of second cell not twice that of 

 second from tip. Inner tooth of claw large but somewhat smaller 

 than outer tooth. 



Length '25 inch (6mm.) 



Expanse "60 inch (14mm.) 



Described from a single $ from Disco Island, This species is 

 allied to, but readily distinguished from concolor, rapax and labra- 

 doris. 



