24 JXODOIDEA^ OR TICKS; OF THE UNITED STATES, 



above; legs blackish except the joints, long, strong. The dorsum of 

 the expanded abdomen has two deep parallel furrows anteriorly and 

 three posteriorly, and the ventral surface has the ordinary furroAvs of 

 the genus, much as in ricinus. The color of the alcoholic specimens 

 is a testaceous j^ellow. Length of expanded female, 6 mm. Length 

 of dorsal shield, 1,25 mm. ; Avidth, 0,92 mm.'"' 



Ixodes calif ornicus Banks, 



Female. — Shield yellow-broAvn, legs darker brown, abdomen yel- 

 lowish gray, unspotted, Capitulum (PI, II, fig, 12) not nearly as 

 broad as in /, ricinus, the posterior angles acute, the porose areas sub- 

 triangidar, but plainlv broader than long, and separated by about 

 their length, inner edge oblique; palpi moderate, second joint plainly 

 a little longer than the third, the latter not twice as long as broad. 

 Shield (PI. II, fig. 12) but little longer than broad, somewhat trape- 

 zoidal, the outer sides rather angulate before the middle, lateral cari- 

 nae not distinct, but traceable, punctuations numerous and fine. Abdo- 

 men striate, punctate, and hairy; ventral furrows divergent behind, 

 legs rather slender, very hairy below, tarsus I fully one and one-half 

 times longer than metatarsus, tapering to the tip, tarsus IV but little 

 longer than metatarsus, tapering; coxa I with a long, sharp, basal 

 spine, and a minute tooth at apex behind to all coxse; stigmal plate 

 rather small, nearly circular, and its surface finely granulate. 



Length of female shield, 1.2 mm. 



Male. — Similar to that of /. xcajmlaris, but the shield has more 

 nearly parallel sides, and the stigmal plate is nearly circular, the 

 palpi are very short, and coxa I has a long, sharp spine behind. 



Length of male, 2 mm. 



Specimens from Claremont, Santa Clara County, Santa Cruz 

 Mountains, and Redwood Creek, Humboldt Comity, all California. 

 The hosts were gray fox and black-tail deer. 



Separated from /, ricii'ms by shape of the porose areas, and from 

 I. scapularis by more distinct lateral carinse, and many minor points. 



Ixodes ricinus Linnaeus. (PL IX, fig. 5.) 



Female. — Shield reddish brown, body, legs, and palpi a paler 

 brown, unspotted. Capitulum (PI. II, fig. 9) very broad and short, 

 porose areas twice as broad as long, not separated by their length, 

 inner edge rounded, outer ends nearly reaching to basal angle of 

 capitulum; palpi moderate, second joint barely longer than the last, 

 the latter fully twice as long as broad. Shield (PL II, fig. 13) 

 rather elliptical, plainly longer than broad, and the outer sides some- 

 what angulate much before the middle, lateral carina? short and in- 

 distinct; many small, equal punctures, most numerous behind. Legs 

 long, tarsus I (PI, II, fig. 9) fully one and one-half times as long as 



