44 IXODOIDEA, OR TICKS, OF THE UNITED STATES. 



of the previously described Dermacentors ; the shape of the stigmal 

 plate would indicate D. variabilis^ but the lack of markings would 

 indicate D. parmnapertus. Among Doctor Marx's drawings are 

 several figures of this specimen, and they are presented on the plates 

 (See PL X, fig. 1) so that when the life histories of all of our 

 Dermacentors are known it will be possible to place this name under 

 the species to which it belongs. 



I have not been able to locate the specimen which, according to 

 Doctor Neumann (/». lift.), should be in the National Museum collec- 

 tion, but it was not in the material returned, nor indicated on the 

 list of material returned to the Museum. 



Dermacentor albipictus Packard. (PL X, fig. 11.) 



Male. — White above, with brown spots and streaks in a definite 

 pattern ; capitulum, palpi, and legs white above, rest reddish brown. 

 Capitulum (PL VII, fig. 9) quite broad, hind angles produced, but 

 not as long as in D. occidentalis ; j)alpi short, not nearly as long as 

 width of capitulum. Dorsum more slender than in most species, 

 fully one and three-fourths times as long as broad, with a great 

 many rather small punctures, lateral grooves not very distinct, pos- 

 terior margin with twelve impressed lines. Legs rather large and 

 long, fourth pair much larger than others, teeth below large and 

 distinct. Coxae armed as usual; coxse IV (PL VII, fig. 11) plainly 

 wider on base than long. Stigmal plate (PL VII, fig. 11) elliptical, 

 without distinct dorsal prolongation, its surface provided with many 

 large granules. 



Length of male, 4 mm. 



Female. — Capitulum, palpi, and legs white above, reddish or yel- 

 lowish brown beneath; shield mostly white, a long median streak, 

 not reaching apex, a narrower stripe each side, and some spots near 

 eyes, red-brown ; elsewhere the white is rarely broken by small brown 

 spots; abdomen dark red-brown. Capitulum (PL VII, fig. 9) quite 

 broad, its hind angles only slightly produced, the porose areas very 

 large, and not far apart, the palpi very short and broad, the shield 

 (PL VII, fig. 5) plainly longer than broad, usually much longer, and 

 broadest much before the middle, the punctures few and not promi- 

 nent. Abdomen rather more elongate, the sides more nearly parallel 

 than in allied forms. Legs long, the coxae armed as usual; stigiual 

 plate (PL VII, fig. 9) large, semielliptical, without distinct dorsal 

 prolongation, and covered with many large granules. 



Length of female shield, 2-2.2 mm. 



This tick occurs throughout the northern parts of the United 

 States and in Canada. I have seen specimens from Adirondack 

 Mountains, New York; Michigan; Nebraska; Montana; Bear, Idaho; 

 Nevada, and Pullman, Wash. It has usually been taken from moose 



