SIX NEW SPECIES OF MALLOPHAGA FROM NORTH 

 AMERICAN MAMMALS. 



By E. A. McGregor, Bureau of Entomology. 



Trichodectes kingi n. sp. 



Two females (Bishopp No. 2464) from weasel, Putorius sp., 

 (Florence, Mont., June 16, 1910, coll. W. V. King), female and 

 immature specimens (Bishopp No. 3181) from weasel (Florence, 

 Mont., April 21, 1914, coll. H. P. Wood), and five females 

 (Bishopp No. 3219) from weasel (Florence, Mont., April 18, 

 1914, coll. H. P. Wood). 



This species is nearest T. retusus N. and T. minutus Paine. 

 The former is from Mil stela vulgaris and M. erminea, and the 

 latter from Putorius noveboracensis. It differs materially from 

 T. retusus in the entire absence of spines on the dorsal portion 

 of the abdominal segments. It differs from T. minutus in the 

 more elongate head, in the absence of dorsal abdominal spines, 

 and in the rather distinct transverse, abdominal blotches. 



Description of Female. — Total length, 1.139 mm.; length of head, 

 .305 mm. ; length of prothorax, .08 mm. ; length of metathorax, .059 mm. ; 

 length of abdomen, .094 mm.; width of head across temples, .32 mm.; 

 width of prothorax, .29 mm.; width of metathorax, .36 mm.; width of 

 abdomen, .48 mm. 



Head slightly wider than long, rather abruptly narrowed anteriorly, 

 with a very distinct median emargination, and produced into a prominent 

 trabecula-like process just before each antenna. Antennal sinuses 

 of considerable longitudinal span, but very shallow. Ocular projections 

 not prominent. Temple margins diverge slightly posteriorly and meet 

 the occipital margin without an angle. Occipital margin of one even, 

 rotundate curve from temple to temple. Antennal bands not decidedly 

 distinct, separated from each other anteriorly by a rather wide, clear 

 area, continued faintly across the antennal bases to the ocular blotch 

 which is very distinct. A small triangular, posterior-pointing flap 

 projects dorsally at the hind end of the distinct portion of the antennal 

 bands. Occipital bands broad and distinct at their bases, continued 

 narrower and fainter tb the ocular blotches. Underlying bands are 

 visible, extending from the bases of the occipital bands to the mandibles. 

 Four short hairs occur on each anterior margin between the median 

 emargination and the trabeculas, one weak hair arises from the eye and 

 one immediately behind this, two long hairs at the temporal prominence, 

 and three weak hairs between the latter and the prothorax. Antennae 

 of average size, about reaching the posterior margin of the head; the 

 three segments of about equal length. 



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