136 PROCEEDINGS ENTOMOLOGICAL SOCIETY 



bristle at each corner, a bristle at base of coxa II, also at IV, and one 

 each side of vulva; vulva not reaching back of coxa III. On ventral 

 plate are three bristles each side ; the lateral plates have a few bristles 

 and one each side on anal plate, the anal plate appears closely attached 

 to the postanal plate. 



Length, 1.1 mm. 



From the beetle Passalus cornutus, at Guelph, Ontario, 

 Canada. 



Laelaps multispinosus, new species. 



Pale yellowish ; body rather more than one and a half times as long 

 as broad, very broad behind legs. Body and legs with many short, 

 stout, spine-like bristles, those on the dorsum mostly curved, those on 

 venter longer and straight ; sternal plate with two on anterior margin, 

 and three each side, ventral plate with a basal pair and three on each 

 posterior side, anal plate with a median one behind, rest of venter with 

 many similar spines, coxae I each with two large spines, II with one 

 large spine, III with one short spine, and IV mutic. Legs with many 

 short spines and hairs ; tarsus II with two short stout spines just before 

 tip, III and IV with many stout spines. 



Length, 1 mm. 



Guelph, Ontario, Canada, from muskrat, April 26. Resem- 

 bles L. cchidinus from rats (which species occurs in California) 

 but with shorter spines on dorsum, and the hind coxse unarmed. 



Laelaps, pedalis, new species. 



Pale yellowish. Body about twice as long as broad, slightly more 

 narrowed in front than behind. Dorsum with many quite fine hairs, 

 those on posterior sides are longer. Venter with quite a number of 

 slender bristles, sternum with a pair in front, and four each side at 

 bases of the coxae. Legs with many bristles, especially near tips of tarsi, 

 a stouter spine on inner side near tip of palpus. Legs moderately 

 slender, not very long, first pair much shorter than the body, tarsi 

 tapering, except I, which ends bluntly. 



Length, 1 mm. 



Guelph, Ontario, Canada, on chipmunk, in May. In a gen- 

 eral way this species is related to L. cchidinus and L. inultispin- 

 osns, but all the bristles are fine instead of spine-like; the 

 venter is much like L. prophcticns, but the ventral shield has 

 more bristles, the hind legs are shorter, etc. 



Laelaps propheticus, new species. 



Male Pale yellowish-brown, dorsum with many fine, short hairs, 

 venter with the ventral plate narrowed at base and a large triangular 

 plate each side behind hind coxae, anal plate broad, but very short. 



