118 THE CANADIAN ENTOMOLOGIST. 



Ceuthophilus ierrestris, Scudd., Proc. Amer. Acad. Arts. Sc, XXX., 

 46 (1894). 



Measurements: Length of body, $ 12.5 mm., ? 14 mm.; of 

 pronotum, $ 4.5 mm., $ 4.25 mm.; of fore femora, $ 6.3 mm., $ 

 5.75 mm.; of hind femora, $ 14.3 mm., 9 12.7 mm.; of hind tibife, ^ 

 15.5 mm., 9 14 mm.; of ovipositor, 7.5 mm. 



This is the species to which most of Scudder's types belong, but the 

 few mature males in the collection are identical with neglectus, and his 

 description of ierrestris is evidently based partly upon these. His state- 

 ments regarding the hind femora and tibiae especially apply to neglectus. 

 The chief distinctions between the two species in this particular are given 

 in the above key. The legs in terrestris are much longer and more 

 slender; and the scalariforhi markings on the hind femora much more 

 distinct, closely resembling those of maculatus, though usually paler, as 

 Scudder himself has defined them. 



C. terrestris has a more northern range than neglectus^ being charac- 

 teristic of the Boreal and Transition zones. 



The specimens of undoubted "/^rr^j/r/j- in the Scudder collection are 

 from the following localities: Anticosti; Gorham, Norway, and Moosehead, 

 Lake region, Me.; Mt. Washington and Franconia, N. H. 



In Ontario 1 have taken it at Niagara Glen, Aug. 18, 1904; Toronto, 

 Aug. 8, 1904; (roderich, Aug. 19, 1901 ; De Grassi Pt., Lake Simcoe, 

 June 29, 1901 (half grown), Sept. 7, 1902 ; and I have also a female from 

 Morris Id., Lake Joseph, Muskoka, taken by Mr. E. M. Morris, July 12, 

 1888. I liave not found terrestris common anywhere in Ontario, but 

 came across it in considerable numbers on the Isle d'Orleans, P. Q., Aug., 

 1904, under fiat stones, at the foot of a wooded hill. It was in company 

 with C. inacitlatus. 



Mr. J. A. G. Rehn has recently reported the true terrestris from 

 Keweenaw Bay, Lake Michigan. 



Explanation of Plates. 

 Plate IV. 

 Fig. 1. Ceuthophilus maculatus, (^ , Isle d'Orleans, P- Q- ( x 3). 



I a. Ceuthophilus maculatus, ^ , terminal segments of abdomen from 

 above ( x 10). 



lb. Ceuthophilus maculatus, ^^ , subgenital plate, from below ( x 10). 



ic.  " " " subgenital plate, lateral view (x 10). 



2. " pallidipes, " Lake Simcoe, Ont. ( x 3). 



