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dilated basally, trochanters very long, haying a long thin basal 

 part, about as long as the stouter apical half ; first and fourth tarsal 

 joints not differing much in length, the chelae very long and slen- 

 der; the fifth tarsal joint beneath with long rows of lamellate den- 

 ticles, the denticles becoming longer and more distant from one 

 another towards the articulation of the claw ; in lateral aspect the 

 sides of this joint are almost parallel, and nearly straight, except 

 of course at the modified apex ; chelar claw curved on its apical 

 third, its lower edge on basal part slightly curved. Abdoniicn 

 dull, clothed with sparse white hairs, the surface having a very 

 minute and close, longitudinal rugulosity. Length 3.5 — 4.5 mm. 

 HAB. Nogales, Arizona ; on weeds and grass in August. 



2. Chalcogonatopus haralcptias sp. nov. 



Form and general appearance that of C. leptias, the legs and 

 chelae being similar. The clypeus however is only pale round 

 the edges, the antennae have the fifth and sixth joints clear yel- 

 low, the two or three following these sordid or obscurely yellow- 

 ish, the fourth also more or less sordidly pale, scape and second 

 joint dark brown above, the third black. The anterior m.argin of 

 the pronotum is not distinctly emarginate in the middle, it is 

 more or less pale at the sides, as also is the mesonotal constric- 

 tion ; the front femora and tibiae are dark, black or nearly so, and 

 the first two tarsal joints are dark pitchy. The hind and middle 

 femora are black or pitchy on the dilated part, yellow on the 

 slender apical portion, but the tip of this is conspicuously dark 

 in the hind legs; the tibiae are brown, the tarsi clear pale brown- 

 ish yellow. 



HAB. Nogales, Arizona ; on oak in August. 



3. Chalcogonatopus cuprcpcs sp. nov. 



A narrow slender species like C. leptias and paralcptias in 

 form, the front legs very long, the trochanters with long basal 

 stalk, and the chelae as in those species. 



Head, pronotum and mesonotal constriction bright brown ; 

 miandibles except the teeth, the front of the scape, and a line on 

 the inner orbits, yellowish-white, the latter covered with glitter- 

 ing silver hairs. Antennae clear yellow, the three apical joints 

 infuscate, the last being the blackest. Front legs clear testaceous, 

 the trochanters paler, the basal joint of the tarsi (excepting its 

 apex) alone dark; middle legs similarly coloured, but the coxae 



