Bishopp — A New Species of Dermacentor. 33 



engorged) which were collected January 18, 1912, on a marten near 

 Woodman, Mont. 



Il is worthy of note that no males were taken although <»l females, in 

 all stages of engorgement, were collected. Females were taken upon ho<ts 

 during every month of the year except May, October and December. The 

 immature Stages, however, were taken on hosts fn.ni .July to November 

 only. 



A lew note- have been made on the type specimens. Width of basis 

 capituli, 541/*; length of palpi, 4(>7m. The porose areas are not well defined, 

 being surrounded by the roughened surface of the hasis capituli; the 

 palpi are also roughened dorsally. The stigma! plates are broadly oval, 

 the greatest length at right angles to the axis of the body. They measure 

 about 196 x 152/*. The goblets are rather large, apparently three rows at 

 widest and one row at narrowest point between macula and marginal 

 cells. Among the paratypes the width of the basis capituli ranges from 

 188 to 517/* and the length of the capitulum from 646 to 717m. In general 

 the paratypes agree closely with the type; some, however, have the shield 

 rugose over nearly the entire surface. 



The specimens studied show a considerable variation in certain points. 

 The size of individuals even from the same locality varies much. The 

 ticks from the Northwest usually have larger porose areas than are exhib- 

 ited by material from Texas. The porose areas in some of the specimens 

 from Washington and Montana an' not more than one-half as long as 

 broad. All specimen-; show rugosity on the scutum and basis capituli 

 though the extent of roughness varies considerably. The length of the 

 capitulum in the series studied has been found to vary from 459 to 717m 

 and its width from : > .7:; to 541/*. The length of tarsi I varies from 402 to 

 <>3i*t and tarsi IV from :;7:; to 060/*. The stigmal plates range from 222 

 x 301 to 125 x 143m. 



Dermacentor hunteri sp. nov. 



Male (Fig. I). — Length, not including capitulum, 4.42 mm.; width, 

 2.98 mm. 



( apitulum ( Figs. I, .">): length, 875/t (from tip of hypostome to end of 

 posterolateral angles); basis capituli reddish brown with considerable 

 white on dorsal surface; sides ahout parallel; width, 560/*; posterolateral 

 angles long (shorter than in D. orcidentnlis); ventrally, basis capituli is 

 quite narrow and slightly roughened along posterior border; length of 

 palpi (dorsally), 474/*; extreme length of article II (dorsally), 244/*; of 

 article III, 201/*; some white on basal portions of articles II and III, also 

 a few pits and short hairs; article I prominent ventrally; bearing fine 

 bristles along its internal edge, article II has six such bristles and article 

 III one bristle; hypostome very broad at apex, narrowed toward base; 

 three rows of rounded teeth on either side, nine large teeth per row, 

 -mailer teeth toward base where the three rows converge, the teeth grad- 

 ually becoming smaller until they disappear at base; chelicerae rather 

 -mall; length of internal article 130/*, with a small external subterminal 



