chambeelin: the arachnida. 249 



femora I and II with two broad dark annuli, one just proximad of mid- 

 dle and one at about distal third; femora III with a narrower band 

 at distal end; femora IV black from proximad of middle to distal end; 

 patellae I and II unmarked, but III and IV black at both ends; ante- 

 rior tibiae with two black bands, one about middle and one at distal 

 end; metatarsi and tarsi dark at distal end, the posterior metatarsi 

 also with a vague dark ring near middle. Bulb of palpus blackish. 

 Abdomen yellow ; venter dusky back of the genital furrow except in a 

 narrow transverse band in front of the spinnerets, the dark area divided 

 by a longitudinal median yellow line; dorsum with a folium outlined, 

 a black mark at base and a diamond shaped one near the middle. 



Carapace broad, cordate, being very strongly narrowed cephalad. 

 Groove, fine, longitudinal. 



Posterior row of eyes strongly recurved; median eyes a little more 

 than their diameter apart, four times or more their diameter from lateral 

 eyes. Lateral eyes on each side separated by about their radius. Area 

 of median eyes conspicuously wider in front than behind {cir. 15: 11); 

 and wider in front than long in ratio 15:13. Anterior row of eyes 

 nearly straight, the median eyes clearly larger than the posterior me- 

 dians (ratio of diameters about as 10: 7), nearly once and a half their 

 diameter apart and two times their diameter from the laterals. 



Sternum not fully two thirds as wide as total length; acutely nar- 

 rowed caudad. 



Lower margin of furrow of chelicera with three teeth; upper margin 

 also with three. 



Legs with all joints excepting the tarsi aculeate or spined as usual. 



Patella of palpus of male with a very long spine above; tibia on 

 ventral side extended into a thin blade-like process as wide as the 

 length of the joint; process of cymbium on exterior side narrow 

 proximally and expanded distad into a tomahawk form with the blade 

 partially double. 



Male. Length 7.7 mm. Length of cephalothorax 3.7 mm.; width 

 3.1 mm. 



Locality.— S&n Miguel, 6,000 feet, July. (Type, M. C. Z. 227, 

 one male). 



