ICHNEUMON-FLIES, PART 2\ EPHIALTINAE 75 



Hosts: Reared from Hemerocampa leucostigrna (Abbott and Smith) 

 at Kemptown, N. S., tussock moth at Devon, N. B., and at Charlotte- 

 town, P. E. I., and "Orgyia" sp. at Flatbush, Long Island, N. Y. 



18. Scambus (Scambus) decorus Walley, new species 



Figure 312,j 



Male: Front wing 2.5 to 4.2 mm. long; antenna with 20 to 21 

 segments; front femur rather stout, and with a single, broad, median 

 excision beneath; abdomen a little more slender than in tecumseh; 

 structure otherwise as in tecumseh and nucum. 



Black. Front and middle legs whitish, with front femur and tibia 

 more or less tinged with reddish; hind coxa reddish or occasionally 

 somewhat fuscous; hind trochanter whitish; hind femur reddish with 

 apex more or less fuscous; hind tibia with subbasal fuscous annulus 

 complete; color otherwise as in tecumseh. 



Female: Front wing 4.5 to 5.5 mm. long; antenna with 21 to 22 

 segments; cheek about 0.25 times breadth of base of mandible; temple 

 strongly rounded and rather weakly receding; thorax moderately stout; 

 propodeum with short, very weak, dorsomedial carinae; hind tarsus 

 with basal segment very slightly longer than following three segments 

 combined; abdomen moderately stout; tergite 1 rather small and with 

 few punctures; tergites 2-6 with large, usually distinctly separated 

 punctures and with broad, more or less transstriate apices; sheath 

 equal or subequal to length of abdomen; ovipositor rather weakly 

 compressed and with a distinct nodus. 



Color as in hispae except that front coxa is mostly fuscous. 



Type: 9, Merivale (near Ottawa), Ont., reared in laboratory 

 April 17, 1948, Forest Insect Survey No. 048-6D (Ottawa, No. 6756 in 

 Canadian National Collection). 



Paratypes (in Canadian National Collection at Ottawa): d\ 

 Creston, B. C , June 27, 1949, D. B. Waddell. 9, Likely, B. C, July 

 7, 1938, G. S. Walley. 9, Robson, B. C, May 20, 1949, H. R. Foxlee. 

 d\ Robson, B. C, Aug. 26 to 31, 1949, H. R. Foxlee. 9, Mount 

 Desert Island, Maine, July, 1929, A. Brower. d* , Mount Desert Island, 

 Maine, July 10, 1931, A. Brower. 2d 1 , Mount Desert Island, Maine, 

 July 4 and 5, 1932, A. Brower. 4d\ Aweme, Man., June 25, 1924, R. M. 

 White, d\ Fredericton, N. B., June 21, 1957, No. 57-0064-01-2. 

 d\ Annapolis, N. S., May 25, 1927, F. C. Gilliatt. d", Annapolis, 

 N. S., Aug. 17, 1929, F. C. Gilliatt. d\ 9, Berwick, N. S., July 17, 

 1928, F. C. Gilliatt. d 1 . Blomidon, N. S., July 24, 1950. d\ Kings 

 Co., N. S., July 1955, H. Stultz. 2d 1 , Mattock, Hants Co., N. S., 

 July 1957, J. McDunnough. d 1 , 9, Parrsboro, N. S., July 11 and 

 Aug. 5, 1944, J. McDunnough. 2d 1 , Pleasant Point, N. S., Apr. 3 

 and 5, 1954, J. McDunnough. d\ Welsford, N. S., June 17, 1955, C. 



