DERMACENTOR NIGROLINEATUS PACKARD. 49 



mal i^late (PI. VIII, fig. 3) elliptical, of same shape as in male, no 

 dorsal prolongation, and covered with many large granules. 



Length of female shield, 1.2 mm. 



Specimens in the Xew York State collection at Albany, probably 

 from Adirondack ^Mountains; Packard's type, which I have seen, 

 was from deer from this region; I have some from Catskill Moun- 

 tains, Xew York, in June. Recently Mr. W. D. Hunter has received 

 several specimens taken by JNIr. Eumsey from deer at Laredo, Tex., 

 and Mr. H. S. Barber took one from deer at Crab Lake, Vilas County, 

 Wis. Neumann placed this species in Hcemaphi/salis as a synonym of 

 the European 11. eoncinna, a species which now seems not to occur in 

 our country. It is allied to D. alMpietus, but differs in shape of 

 stigmal plate, more distinctly separated porose areas, sharper hind 

 angles to the capitulum, shield more pointed behind, and in shorter 

 tarsi. Quite possibly it is the Ixodes erraticus of Say. 



Dermacentor variabilis Say. (PI. X, figs. 3, 4.) 



Male. — Red-brown, dorsum Avith irregular white marks, the usual 

 pattern being a submarginal stripe each side, starting from the an- 

 terior angles and reaching straight back to beyond the middle, where 

 they unite, or nearly so, and thence giving off' branches straight back- 

 ward and obliquely outward to the side margin; along the sides and 

 on the festoons are scattered white spots. Specimens from Texas 

 and Florida often have these markings more extensive and more con- 

 nected together, and some white on the median anterior part of dor- 

 sum. Legs red-brown, the tips of the joints white. Capitulum (PI. 

 VII, fig. 4) about twice as broad as long, its posterior angles slightly 

 produced; palpi nearly as long as width of the capitulum. Dorsum 

 fully one and one-half times as long as broad, with many deep and 

 prominent punctures, but the anterior median region nearly free of 

 them; lateral grooves distinct; twelve impressed lines behind; legs 

 rather long and stout, hind pair much heavier than the others, and 

 the teeth below distinct. Coxae armed as usual for the genus, the 

 hind coxse but little broader than long. Stigmal plate large and 

 broad, with a short dorsal prolongation, surface densely covered with 

 minute granules. 



Length of male, 4 mm. 



Female. — Red-brown, shield with white on the sides, and broadl)'^ 

 around the tip ; a brown marginal stripe near eye, and sometimes 

 two white strealvs in the middle area. Legs red-brown, tips of the 

 joints white. Capitulum (PI. VII, fig. 3) fully twice as broad as 

 long, its posterior angles only slightly produced, the porose areas oval, 

 of moderate size, and well separated; palpi short and very broad. 

 Shield plainly a little longer than broad, broadest at middle, and 



