•.'60 DAVKXPOni ACADEMY OF XATITRAL sriEXrES. 



than tlie upper, ami has two lar^e t.eetli; tlie intprior beinii' largest, aud with 

 a small denticle on its anterior niaririn; the lower rtnjrer with a distinct late- 

 ral carina exteudiu;^ nearly to the point; hruslies to the lingers as in the 

 other $ Datameg. Maxillary palpus; feninr with a number of spiny hairs on 

 the inside, especially on the ultimate poi-tiou; tihiaand metatarsus also with 

 a tew irregnlar spiny hairs on the inside; more slender than those on the 

 femur; thickly clothed, especially on outside, with tine, short hairs, with a 

 few very long ones interniingled; length, femur, six mm.; tibia six and a 

 half mm.; metatarsus, five mm. ; tarsus, one and a iialf mm., each enlarged 

 from base to extremity; metatarsus, and tarsus closely and rigidly united, 

 l)Ut separation distinct; tarsus with numerous fine hairs. First legs slender, 

 with tine hairs, without spines, without claws. Second legs, metatarsus, 

 with six spines one side, four the other; tibia with two spines aear the end, 

 several weaker ones toward the base. Third legs, metatarsus with five ])airs 

 dorsal spines; three ventral spines; tibia, with few weak spines. Fourth 

 legs, metatarsus, witii row of about nine s])inv hairs on underside, besides 

 the three regular sjjiues; no .spines on back; tarsus long, single Joint with 

 about four pairs of spines beneath; all the legs furnished with numerous 

 line hairs, some of them very long; ti])ife I, II, III, with terminal spine. 

 Head and abdomen almost witliout iiairs; first sub-abdominal segment with 

 sub-triangular plate divided into two lobes by a longitudinal dejiression, 

 which enlarges at about the ultimate two-thirds into a sublunar cavity, and 

 this again after a slight contraction into a larger semi-circular cavity. Semi- 

 circular depressions on posterior margins of second aud third segments each 

 with two spiraculu- openings. 



One $ Museum Acad. Nat- Sci., Fliila. Locality unknown. [I)escrii»tion 

 written October 23, 1880.J 



Datamks cixkuea. Putnam. 



Ayn^es with Simon's description of I)(itaiii» n^ except as follows: 

 The fixe<l finger is not (piite as long as tlie " tige". The front tooth 

 mucli more distant from the next than in any otiier species. Meta- 

 tarsus of fourth pair witli six sti'ong spines. They differ (juite per- 

 ceptiblv from all other Datamex known to me, in heing much more 

 liairs'. 



i Length 2(5 — 27 mm.; color, pale reddisli yellowish wiiite; darker and 

 more reddish on the head and mandibles, feet j^aler; fingers of mandil)les, 

 chestnut l)rowu, becoming very dark at the i)oints; abdomen showing traces 

 of a grayish dorsal hand . Cephalic siiield a little brcjader than long, with- 

 out median stritt; its anterior border slightly convex ; its sides i-etreating to- 

 wards the rear; i)osterlor border rounded, scarcely at all truncated; very 

 hairv; hairs slender, long and pale colored. Eye prtmiinenc.e of medium 

 size, elevated and projecting over the front ; furnished with lunnerous slen- 

 der, irregular, pale colored hairs more aljundaut in front ; scarcely darker 



