4 PEOCEEDIXGS OF THE NATIONAL MUSEUM vol. 82 



first but conver<iin<i- near the center of the scutum, after ^yhich the 

 Avhite is much broken up by brown spots; the narrow stripes con- 

 nect posteriorly with the broad stripe of each side; in some speci- 

 mens the white is l)roken by a hirge brown spot near the apex of the 

 scutum, in which cases the two narrow stripes of white are connected 

 by a narrow bridge of wliite in front of the brown spot. The eyes 

 are light brown, bounded on their mesal border by a dark-brown 

 spot, which continues as a brown stripe along the margin of the 

 shield. Cervical grooves short, forming deep lunules anteriorly; 

 fine punctations as in the male, a few scattered deep punctures bear- 

 ing a fine bristle in each lateral area. Fovea about G9/x in diameter, 

 299/x apart, and located 506/a from apex of scutum. Venter with 

 jnuictations and hairs inconspicuous; genital orifice of nnengorged 

 females between coxae II, vulva of engorged females on level with 

 interspace of coxae I and II; genital grooves slightly converging 

 immediately posterior to vulva, then diverging gently until they 

 have passed beyond the level of coxa IV; at the latter point they 

 diverge at a wide angle as they extend to the festoons, uniting with 

 the grooves between festoons 2 and o. Spiracle (pi. 1, fig. 9) oval with 

 a fairly broad posterodorsal prolongation; 515/x long, 400/* wide; 

 goblets as in male; macula broad, oval, 280/x by 160|U,. Legs pubes- 

 cent, ornate dorsally; coxa I with spines as in male; femur and tibia 

 IV not marked Avith spinelike teeth as in male ; tarsi similar to male. 

 Capitulum (pi. 1, fig. 10) 730/a long, 680/x wide at base, and marked 

 with white ; porose areas WO/i by IIS/a, oval, diverging anteriorly and 

 spaced about half their width apart; cornua rounded laterally, end- 

 ing in a bladelike spine. Palps similar to males with from 5 to 6 

 bristles on internal ventral edge of article I, from 5 to 8 on article 

 II, and 3 such bristles on article III. 



HoJotype.—MixlQ. U.S.N.M. Helm. Coll. Xo. 31500. 



Allotype.— F^m^le, U.S.N.M. Helm. Coll. No. 31501. 



Paratypes. — Three males and one female, U.S.N.M. Helm. Coll. 

 No. 31502, and four males and two females, U.S.N.M. Arachnida 

 Coll. No. 1047. 



Type host. — Pecari angulatus angulatus (Cope). 



Type locality. — Kingsville, Tex. 



Remmfhs. — Of the 12 specimens collected, 8 are males and 4 are 

 females; 2 of the females are engorged and 2 are nnengorged. One 

 of the nnengorged females is apparently newly emerged. The speci- 

 mens vary somewhat in size in both sexes, as may be obserAed from 

 the shield measurements given in Table 1. 



The following combination of characters will aid in separating 

 D. halli from the other species of Dermacentor described from 

 America: (a) The characteristic color pattern of the shield; (b) the 

 absence of numerous deep large punctations; (c) the equal length 



