264 Genus Ixodes 



Described from numerous specimens (N. 290, % s, O s, larvae) from 

 Phalacrocoraw penicillatus (Brandt's cormorant), Pacific Grove, California, 

 1894 (V. L. Kellogg coll.); a specimen (N. 1227, ?) from Unalaska, 

 Aleutian Islands, kindly presented by Professor A. Birula, of St Peters- 

 burg ; the specimens in the Hamburg Museum and others from the 

 Neumann collection were kindly sent to us for study. 



The types of Birula ( ? , o) came from the Island of Unalaska 

 (Wosnessenski coll., 1847). Neumann's description of /. parvirostris 

 was based on specimens (eight !j! s) found on Phalacrocorax pelagicus, 

 Yezo, Japan (Hamburg Mus.). 



48. IXODES UNICAVATUS Neumann, 1908. 



Figs. 265-267 (Figs. 266, 267, original). 

 Lit. and Icon. : Neumann, iv. 1908, p. 1, Fig. I ( ? , reproduced). 



Male : unknown. 



Female (Fig. 265): Body oblong, blood-red, L. 6 - o mm. (capitulum 

 included), broadest (3"2 mm.) in front of the middle of the length. 

 Scutum oval lozenge-shaped, 1'5 mm. I., broadest (0 - 8 mm.) in front 

 of the middle ; cervical grooves shallow, attaining the sides posterior 

 to the lateral angles ; no lateral grooves ; many sub-equal and fine 

 punctations ; surface glabrous, glossy, reddish brown. Dorsum finely 

 striate, giving it a satiny appearance ; a hemispherical protrusion 

 opposite the scapular angles of the scutum posterior to coxa I ; very 

 short, fine and sparse hairs. Venter : integument and hairs as on 

 dorsum ; vulva between the posterior borders of coxae II ; genital 

 grooves commencing behind the vulva, diverging at their posterior 

 third; anal grooves long, parallel, very slightly approaching each other 

 behind, united in a semicircle in front of the anus. Spiracles glossy, 

 smooth, dark, subcircular, very little broader transversely. Capitulum 

 short (065 mm.) ; base short, almost thrice as broad as long ; a small 

 dorsal point protruding laterally on each side; without cornua; porose 

 areas fused in a single transverse depression, which covers almost 

 the whole dorsal surface of the base ; ventral surface with a slight 

 transverse linear protrusion posterior to each palp ; hypostome slightly 

 lanceolate, 3 | 3 then 2 | 2, the two median anteriorly placed rows being 

 composed of small teeth, the outer pairs of rows being composed of 

 8-10 stout teeth; chelicera (?); palps widely separated basally, 



