3. Palpal basal margin straight dor- 

 sally, without angle or spur. 

 Basis capituli almost straight 

 laterally, cornua almost obsolete. 

 Scutal length and width approx- 

 imately equal. (Avian parasite) .H. HOOD I HOOD I 



Figures 138 and 139 



Palpal basal margin angled or spurred 



dorsally. Basis capituli diverging 



laterally, cornua moderate to strong. 



(Mammal parasites ) /!^ 



U. Palpi ventrally with a comparatively 

 long, narrow spur basally, margin 

 dorsally sharply pointed sublaterally; 

 segment 3 ventrally with narrow elon- 

 gate, pointed spur. Coxae each with a 

 strong spur and a few, short hairs; 

 trochanter I ventrally with a strong 

 spurlike ridge (that does not overlap 

 trochantal margin); tarsi abruptly 

 tapering, short, stout, somewhat humped, 

 claw and tarsal length approximately 

 equal. Scutum only slightly longer 

 than wide, broadly rounded posteriorly; 

 p\inctations few, shallow, mostly ante- 

 rior. (Ground- sqxiirrel ,parasite) H' HOUYI 



Fig^lres 11^ and 1^3 



Combinations of characters differ as 



below. (Not normally grovmd- squirrel 



parasites ) 5 



- 3^ - 



