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always ; posteriorly, transversely rugose, the hairs very sparse, 

 in some examples only one or two being visible, but these are no 

 doubt more or less abraded. Anterior legs with the basal thin 

 stalk of the trochanters not long, basal and fourth tarsal joint 

 not dififering much in length, the lamellate denticles on the fifth 

 joint beneath not nearly reaching the articular cavity, the denticle 

 nearest to this loeing twice the size of those at the other end of 

 the row, but the setae, which are fine and long, extend back to 

 the cavity. Abdomen nearly smooth, bearing a very few short 

 hairs, and some excessively faint, obsolete punctures. Length 

 4-4.5 mm. 



Agonatopus paUidicornis var. dubiosus. 



Like a small example of the above in structure, the third and 

 apical joint of the antennae being somewhat darkened or infus- 

 cate, the abdomen shining black, pale only immediately behind 

 the petiole, and on the compressed apical segment. Length 3 mm. 



HAB. Nogales, Arizona ; on weeds in September. 



2. AgoiiatopHS fcrntgiiiciis sp. nov. 



In form and color like A. paUidicornis, but readily distinguish- 

 ed by the black apical joints of the antennae, of which the first 

 two joints are always and the third usually, entirely pale, while 

 one or two of the following may be concolorous with these. 

 Front tarsi generally more or less dark or infuscate, the basal 

 joint being usually largely or entirely pale. The head appears 

 to vary in intensity of sculpture, but this is not strong enough 

 to prevent the surface being somewhat shining, at least in most 

 examples. Structurallv this species may be at once separated 

 from the preceding by the armature of the chelae, the fifth tarsal 

 joint having its lamellate denticles reaching nearly to the articula- 

 tory cavity, the head is decidedly more transverse, and in fresh 

 specimens the propodeum is probably more pilose, but easily 

 abraded. The sculpture of the latter seems to vary similarly 

 in each species. Length 4-5 mm. 



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

 September. 



3. Agonatopus picesccns sp. nov. 



Like the preceding in structure, but differs greatly in color. 

 Head dark brown, pronotum and mesonotal constriction paler 



