CHAMBERLIN: 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; ch es 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 7.7mm. Length of cephalothorax 3.7 mm.; width 
3.1 mm. 
fem. tib.+ pat. met. tar. total 
Leg I 5.6mm. 6.1mm. 3.9mm. 1.5mm. 17.0mm. 
Leg II 4.2 5 3.2 1.4 13.8 
Leg HII 3 2.7 1:6 1 8.3 
Leg IV 4 4 2.9 et 12.0 
Tibia I, 4.3mm. Tibia IV, 2.8 mm. 
Locality San Miguel, 6,000 feet, July. (Type, M. C. Z. 227, 
one male). 
