1911] 



Mann — Some Northwestern Ants and Their Guests 



107 



specimen each of Hetaerius tristriatus and Cremastochilus knochii 

 were taken with this ant at Wenatchee. 



Formica camponoticeps Wheeler. — The only nest found was 

 under a flat stone at Wawawai, March 28, 1909. In the nest were 

 two remarkable, soft-bodied Coleopterous larvae, which I have 

 been unable to determine definitely, though they are probably 

 Coccinellidae. These larva? (fig. l) were in the runways of the 

 nests. In life they were covered densely with a white powder, 

 and some of this remains after an immersion of two years in alcohol. 

 The alcoholic specimens are 6-7 mm. in length; 2.5 mm. greatest 

 width, 2.25 mm. at greatest height. 



Componotus maculatus subsp. vicinus INIayr. — One speci- 

 men of Xenodusa montana, {'i) Casey, taken at Helena, Montana, 

 April 16, 1907. 



Camponotus herculeanus subsp. 

 pennsylvanicus De Geer. Mijrmeco- 

 phila Jormicarum was abundant with 

 this ant on San Juan Island, Wash., 

 in July. 



Camponotus maccooki Forel. — 

 Mr. C. M. Keyes sent me this species 

 from Medford, Oregon, and with it 

 several specimens of Myrmecophila 

 formicarum. 



Fig. 2. Aphodius suspectus sp. 

 nov. 



Aphodius suspectus sp. nov. 



Length 4 to 5 mm., oblong black, shining. 

 Head coarsely pmictate, some of the punctures 

 on the front confluent; a narrow transverse 



impunctate ridge, extending transversely across the head at about one third 

 distance from base; in front of this ridge depressed, then elevated to a low flat 

 tubercle; depressed between this and margin; margined for entire length, margin 

 with row of fine hairs, which end in front of eyes in a brush of longer hairs; front 

 with a few fine, short hairs; clypeus shallowly emarginate. Prothorax broader 

 than long, feebly narrowed behind, at base slightly wider than elytra; sides 

 moderately margined; base with feeble marginal line; sides slightly convex, disc 

 shining, convex, strongly punctate, the punctures arranged unevenly, and varying 

 in size; a longitudinal impunctate line at middle of disc, running entire length 

 of disc; margin with a row of short even hairs; a few fine scattered hairs on disc. 



Elytra brownish, If as long as prothorax, brownish yellow, apex brown; suture 

 and margin sometimes brown; sides nearly straight for one half distances from base, 

 then gradually rounded to apex; stria?, moderately impressed, the outer three 



