A NEW SPECIES OF ICHNEUMON FEOM VANCOUVER ISLAND. 277 



in the wings of certain Orthoptera, where the folding under of 

 the wings takes place. 



Sympetrum flaveolum was looked for at the proper period at 

 both localities where it occurred in 1906, but nothing of it was 

 seen. A like negative result attended a search for S. vulgatum, 

 notwithstanding that a large number of S. striolatum were taken 

 and examined for the characters of the rare species. 



33, Maude Terrace, Walthamstow : 

 October 24th, 1907. 



DESCRIPTION OF A NEW SPECIES OP ICHNEUMON 

 FEOM VANCOUVER ISLAND. 



By P. Cameron. 



Ichneumon mathewi, sp. nov. 

 Black; the anterior tibia? white in front, joints 11-23 of flagellum 

 of antennas cream-coloured, wings light fuscous-violaceous, the stigma 

 and nervures black, the disco-cubital nervure with a long stump ; 

 areolet 5-angled, hardly half the length in front it is behind; the 

 transverse median nervure received shortly beyond the basal. Palpi 

 black. Head and thorax closely punctured; the apical half of clypeus 

 depressed, the sides and apex with scattered punctures. Scutellum 

 roundly convex, the apical slope straight, oblique, less strongly 

 punctured than the rest. Areola large, slightly wider than long, the 

 base not quite transverse, with the sides rounded, the apex transverse ; 

 it is stoutly, closely, longitudinally striated throughout ; the stria? 

 twisted ; the top of the posterior median area is irregularly longi- 

 tudinally striated, the rest more closely transversely striated ; the 

 lateral area? more stoutly obliquely striated. Post-petiole coarsely 

 aciculated, finely, irregularly, aciculated, striated ; the apex in the 

 middle raised, smooth. Gastracceli deep, striated. The ventral fold 

 is distinct on the fourth segment. Antennae short, stout, tapering and 

 serrate towards the apex. Length, 17 mm. $ . 



Vancouver Island (G. F. Mathew, R.N.). 



In the table of the males given by Mr. Cresson (Trans. Am. 

 Ent. Soc. vi. p. 136) this species comes into section i., close to 

 galenus. That species (only the male is known) is " long, 

 slender"; its antennae is also "long, slender," not short and 

 thick, as in the present species, which can hardly be called 

 "slender"; galenus has the punctures on mesonotum "indis- 

 tinct " ; in the present species they are clearly defined and 

 distinct. Mr. Cresson's species has the metanotum "densely 

 punctured," while in my species it is stoutly striated. I. mathewi 

 is an Ichneumon as defined in Dr. Ashmead's table (Bull. U.S. 

 Nat. Mus. xxiii. 171, except that the areola is transverse at the 

 apex. The basal slope of metanotum is deep, steep. 



