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13- Chalcogonatopiis simulator sp. nov. 



Ferrng-inous, abdominal petiole, four apical joints of the an- 

 tennae, and the mandilndar teeth Hack or dark. 



Head dull, appearing very densely and minutely punctate, or 

 shagreened ; third joint of antennae nearly four times as long as 

 the second, the fourth about four times as long as its greatest 

 width. Pronotum not or hardly at all shining, but minutely and 

 ciosel}- punctured, the posterior part very little raised, the trans- 

 verse division being obsolete ; propodeum very dull, sparsely but 

 distinctly pilose, very densely punctate or granulated on the disc ; 

 posteriorly with distinct transverse wrinkles. Chelar claw ex- 

 tremely strongly curved, its lower edge strongly curved towards 

 the base, first and fourth joints of front tarsi not differing much 

 in length. Abdomen smooth and shining along the apical mar- 

 gins of the segments, duller and closely sculptured elsewhere on 

 the intermediate segments, clothed with very sparse pale hairs. 

 Length 5-5.5 mm. 



This species is allied to the following. C. kocbelci, with which 

 in most respects it agrees in structure. It is easily distinguished 

 by its smaller size, differently colored antennae and by the pro- 

 podeum being m|ore strongly rounded above, as seen in profile, 

 rising up more strongly from the mesonotal constriction. 



HAB. Nogales, Arizona : collected on weeds in September. 



14. Clialcogoiiatopus kocbelci, sp. nov. 



Ferruginous, seventh and eighth joints of antennae, black or 

 sufifused with blackish, the sixth also generally more or less 

 suffused ; abdominal petiole black ; teeth of mandibles dark red 

 or brown. Thin portion of femora concolorous with the basal 

 dilated part. 



Head strongly concave above, dull or almost so. with very 

 dense minute puncturation or granular appearance ; third an- 

 tennal joint four times the length of the second ; penultimate 

 joint elongate, about twice as long as wide. Pronotum simple, 

 no trace of a transverse impressed line or furrow, densely sculp- 

 tured like the head in front, but posteriorly smoother and more 

 shining ; mesonotal constriction and propodeum with similar dense 

 sculpture and dull, the latter very long-ovate, the sides gradually 

 narrowing in front to the width of the mesonotal constriction ; 

 the whole thorax sparsely but distinctly pilose. Front trochanters 

 dilating from close to the base, so that there is no elongate basal 



