IXODES DIVEESIFOSSUS NEUMANN. 27 



Ixodes diversifossus Neumann. 



Female. — Shield, capitulum, and legs very dark red-broAvn; abdo- 

 men grayish yellow. Capitulum (PI. Ill, fig. 12) rather triangular, 

 long, hind angles very prominent; porose areas rather small, sub- 

 triangular, much more than width apart; palpi long and slender. 

 Shield (PI. Ill, fig. 14) plainly a little longer than broad, broadly 

 rounded behind, broadest in front of middle, lateral carinas distinct, 

 reaching margin ; surface Avith mostly small punctures, but those near 

 the margin behind are very large. Abdomen striate and punctate; 

 anal grooves subparallel; stigmal plate (PI. Ill, fig. 14) large, nearly 

 circular, coarsely granulate; coxa3 I (PI. Ill, fig. 14) with a large, 

 sharp, basal spine, a small apical cone bej^ond it, and similar cone on 

 coxae II (PI. Ill, fig. 14) and III, that on coxa3 IV very indistinct; 

 legs long and slender, tarsi slender, tarsus I (PL III, fig. 14) about 

 twice as long as preceding joint ; all tarsi taper to tip. Under the 

 beak at base of palpi is a large backward-directed tooth each side 

 (see PL III, fig. 14). 



Length of female shield, l.G mm. 



Two specimens (the types) from a raccoon. New Mexico, in the 

 Hassall collection, and kindly loaned by Doctor Hassall. 



Ixodes hicornis Neumann, described after the types of /. diversi- 

 fossus were returned to the United States, comes extremely close to 

 this species, and I think is identical. It is from Mexico, and I have 

 specimens from Doctor Duges agreeing closely with the description 

 and also with the types of /. diversifossus. The male is still un- 

 known. 



Ixodes pratti n. sp. 



Female. — Dark reddish brown, legs and palpi paler. Capitulum 

 (PL IV, fig. 1) broad, outer angles rather prominent, posterior angles 

 distinctly prolonged; porose areas broader than long, and separated 

 by one-half their width ; palpi short, second joint about one and one- 

 half times as long as broad, last joint scarcely as broad as long; below 

 there is near the base of each palpus a distinct, stout, downward-pro- 

 jecting tooth (see PL IV, fig. 1) . (Hypostome, PL IV, fig. 5.) Shield 

 (PL IV, fig. 1) a trifle longer than broad, narrowed behind, lateral 

 carinse distinct and reaching to the margin, surface rather densely 

 punctate, and many of the punctures quite large. Abdomen striate 

 and punctate, with very fine hairs; anal grooves plainly divergent; 

 stigmal plate (PL IV, fig. 1) small, almost circular, its surface with 

 rather large granules. Coxae with a minute tooth at apex behind; 

 coxa I (PL IV, fig. 1) wdtli a moderately long basal spine (not as long 

 as in /. cookei). Legs short and slender, quite hairy, and the tarsi 

 (PL IV, fig. 4) tapering to the tip. 



Length of female shield, 0.9 mm. 



