1917] New Species of Mallophaga 173 



prominent lobes. Occiput very slightly convex. Antennal bands not 

 very distinct, separated from one another anteriorly by the ample 

 emargination at the sides of which they bend abruptly backward as 

 darker bars; continued faintly across the antennal bases to the fairly 

 distinct ocular blotch. Occipital bands barely discernible, paling to 

 invisibility half way to the ocular blotches. Underlying bands are seen 

 extending from the bases of the occipital bands to the base of mandibles 

 at which point occurs on each side a small dark blotch. Three hairs 

 arise from the front margin on each side of the median emargination, two 

 arise midway to the trabeculae, three just before the antennae, two on 

 each side from clear areas just within the clypeal margin, a hair arises 

 from the eye, four occur along the temple, one at each lateral end of 

 the occipital margin, and six weak hairs occur near the central portion 

 of the dorsal aspect. Antennas of generous dimensions, the second and 

 third joints with posterior prominences. 



Thorax two and two-thirds as broad as long. Prothorax trape- 

 zoidal, the sides diverging posteriorly, with slightly convex posterior 

 margin. A short spine at the posterior lateral angle, and four weak 

 hairs near the middle. Metathorax with conspicuous lateral extensions, 

 then abruptly converging to the evenly concave posterior margin. Two 

 shortish spines on the lateral wings, a long hair just behind these, and a 

 transverse series of six long hairs. Legs about as usual. 



Abdomen oval in outline, widest on the third segment. Segments 

 one to five inclusive with conspicuous lateral plates. Plates I with 

 three marginal spines and one dorsal spine; plates II with two marginal 

 and three dorsal spines; plates III with three marginal and two dorsal 

 spines; plates IV with three marginal and one dorsal spine; plates V 

 with three long submarginal hairs. Segment one with two median 

 spines just behind the thoracic border, and with a transverse series of 

 about eleven spines. Segment two with a transverse series of about 

 fourteen spines. Segment three with a transverse series of about 

 eighteen spines. Segment four ^^^th a transverse series of about seven- 

 teen spines. Segment five with about fifteen spines in a transverse 

 series. Segment six with a transverse row of about seventeen spines. 

 Segment seven with four long hairs near the posterior lateral angle and 

 two near the middle. Segment eight with a lateral series at each side 

 of three spines each just within the female appendages, and with six 

 weaker ones near the notched tip. 



Trichodectes odocoilei n. sp. 



Three females (Bishopp No. 2468) from White-tailed deer 

 {Odocoileus virginianiis macrourus), Lolo Hot Springs, Mont., 

 June 23, 1910, coll. W. V. King. 



This species agrees fairly well with T. tibialis Piag. as 

 figured by Morse and by Osborn, but it is very distinct from 

 the original description and figure of Piaget, especially in the 

 following characters: Point of insertion of antennae; front of 



