AMMOTRECHA. 



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1. Ammotrecha stolli (Tab. XIL figg. 8, 8 a,h) 



Cleobis stolli, Pocock, Ann. & Mag. Nat. Hist. (6) xvi. p. 97 (1895) \ 

 Ammotrecha stolli, Kraepelin, Das Tierr., Palpigradi et Solifugse, p. 115 (1901) *. 



2 • Colour : head-plate pale yellow* ocular tubercle black with a median pale stripe ; mandibles yellow, with 

 the fangs ferruginous ; upperside of abdomen with a median yellow stripe, the sides of the tergal 

 plates fuscous, the fuscous area on each side about as wide as the median stripe or rather narrower, on 

 the posterior terga the median stripe gradually dies away; lateral integument of abdomen ashy or violet- 

 grey above adjacent to the terga, the sides of the thoracic terga also infuscate ; palpi mostly yellow, with 

 distal end of femur and tibia lightly infuscate, the distal half of the tibia and the tarsus more deeply 

 infuscate ; first leg pale, second only lightly infuscate, third more strongly infuscate on femur, patella, 

 and tibia, with an indistinct pale ring round the end of the patella; fourth leg with the femur, patella, 

 and tibia strongly infuscate, with a distinct and broad yellow ring round the tip of the patella. Width of 

 head equal to length of patella of palp, slightly shorter than its tibia and tarsus and the patella of fourth 

 leg. Mandible with upper fang armed distally with three large subequal teeth and a small one between 

 the second and third set almost upon the base of the anterior side of the latter ; lower fang with two 

 larger subequal teeth and a small tooth between them nearer the base of the inner. Palpi without 

 spines on femur and patella ; tibia with five pairs of strong short spines beneath, and furnished with 

 numerous cylindrical bristles. Third and fourth pairs of legs with three anterior and one posterior distal 

 spine beneath ; tarsus with four pairs of spines beneath. 



c? . Like the female in colour, but smaller, and with longer appendages. Width of head much less than length 

 of patella or tibia and tarsus of palp or than patella of fourth leg. Upperside of the tibia and the lower 

 side of the patella of the palp with cylindrical bristles. Flagellum elliptically elongate, its upper and 

 lower edges widely separated. 



Measurements in mm. — $ . Total length of body 18 ; width of head 4*3 ; length of palp 15, its patella 5 ; tibia 



and tarsus 5*3 ; of fourth leg 16, its patella 5. <? . Total length 12 ; width of head 2-5 ; length of palp 1 5, 

 of fourth leg 15. 



Hab. Guatemala {Sarg), Eetalhuleu (Stoll l ) ; Nicaragua 2 ; Costa Eica 2 . 





2. Ammotrecha picta, sp. n. (Tab. XII. figg. 9, 9 a.) 



2 . Differing from A. stolli principally in colour ; head-plate deep chocolate-brown, ocular tubercle black, 

 without median pale band ; mandibles infuscate above, with three deeper-coloured dark stripes ; abdomen 



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coloured like that of A. stolli, but the lateral integument adjacent to the tergal plates paler, bence the 

 dark area of the plates stands out more boldly as a pair of isolated bands ; palpi entirely infuscate, except 

 the basal half of the femur; first leg lightly infuscate, second, third, and fourth legs deeply infuscate, 

 with no distinct pale ring round the distal end of the tibia of the fourth leg. Mandibles with dentition 

 as in A. stolli. Length and spine-armature of legs as in that species, 

 c? . Resembling the female in colour, and like the male of A. stolli, but the cylindrical and other bristles on 



the palpi less numerous. 

 Measurements in mm. — $ • Total length 18 ; width of head 4 ; length of palp 12, of fourth leg 14. <f . Total 

 length 15 ; width of head 3 ; length of palp and of fourth leg 16. 



Hab. Guatemala (Sarg). 





3. Ammotrecha peninsulana. 



Ammotrecha peninsulana, Banks, Proc. Calif. Acad. Sci. (3) i. p. 290 (1898) l ; Kraepelin, Das Tierr., 



Palpigradi et SolifugEe, p. 112 (1901) \ 



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2 • Colour : head-plate and mandibles yellowish-red, lightly infuscate ; abdomen with a narrow, brown, median, 

 dorsal stripe, lighter brown elsewhere; palpi with femur yellowish-brown; patella brownish-red in the 

 middle, with yellower distal and proximal ends ; tibia yellowish-brown at the base, becoming darker 



biol. centr.-amee., Arachn. Scorp., Pedip., & Solif., October 1902. 











