12 Proceedings of the Biological Society of Washington. 



(about as 22 : 21). Tarsus and metatarsus together about equal in length 

 to the tibia. Metatarsus shorter than tarsus. Tarsus and metatarsus 

 together ten times longer than thickness. 



In the fourth legs the femur is very nearly 2.7 times longer than deep; 

 edge of proximal end straight, vertical or nearly so, not extending back over 

 trochanter, the upper angle rounded. 



Last three segments of abdomen telescoped. 



Flagellum, in the female, five times as long as thick; three-jointed, the 

 terminal joint two-thirds of the total length. 



Length of body from base of chelicerae to base of flagellum, 3 mm.; 

 of palpi, 1.75 mm.; of first legs, 4.5 mm.; of fourth legs, 3.56 mm. 



Locality. — Porto Rico: Coamo Springs. Several females taken in Nov., 

 1899. 



Said in a field note to have been taken "on a very wet bank in deep shade. 

 Very active." 



Schizomus guatemalensis, sp. nov. 



Carapace and legs fulvous, a little smoky, the palpi distally more reddish. 

 Dorsum of abdomen somewhat darker, more dusky, than carapace. 

 Sternum and coxae beneath more yellow. 



Head with no trace of eye-spots. Cephalic sternum very nearly as wide 

 as long. The second division of carapace has no indication of a median 

 longitudinal line. 



Palpi less than half the length of the body. Trochanter of palous deep; 

 its anterior inferior angle not produced, a little obtuse. Femur nearly 

 twice as long as deep (about as 1.9 : 1) ; its inferior margin convex and with- 

 out process. The patella with dorsal margin about two and a half times as 

 long as the depth, its inferior margin nearer twice the depth; unarmed 

 claw half as long as the upper margin of the tarsus. Tarsus and meta- 

 tarsus together about 10.5 times longer than thick and metatarsus about 

 five-sixths as long as the tarsus. 



Coxa of first legs terminating caudad of outer angle of endite. Femur 

 shorter than patella, longer than tibia. Tarsus and metatarsus together 

 clearly shorter than the tibia (about as 4:5). Metatar.sus shorter than 

 tarsus but longer than tarsus without its distal article; distal article of 

 tarsus half as long as the second metatarsal joint. 



In the fourth legs the femur is three times as long as deep, with its proxi- 

 mo-dorsal angle distally rounded, not at all projecting proximad over the 

 trochanter. 



Last three joints of abdomen moderately telescoped. 



Flagellum about four and a half times longer than thick; maximum setae 

 nearly two-thirds as long as flagellum. 



Length of body from base of chelicerae to base of flagellum, 4.56 mm.; 

 of palpi, 1.92 mm.; of first legs, 5.88 mm.; of fourth legs, 4.56 mm. 



Locality. — Guatemala: San Rafael. One female. 



This species suggests simonis Hansen and Sorenson of Venezuela, but 

 in the female may be distinguished by the shorter and stouter flagellum, in 

 having the metatarsus and tarsus much longer in proportion to the tibia, 

 in lacking "eye-spots," in the shorter palpi, etc. 



