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with the sculpture of the abdomen. The maxillary palpi have 

 the three terminal joints unusually short. 



5. Agonatopus hctcrothorax sp. nov. 



Black, the three basal joints of the antennae brown, the second 

 paler, the scape whitish in front. Clypeus and mandibles (except 

 the teeth) testaceous or yellowish, the former dark on the disc. 

 Pronotum along the sides, and the front coxae beneath, brown- 

 ish. The legs are largely dark colored, or nearly black, the an- 

 terior femora and the thin part of the middle and hind ones more 

 brownish-pitchy, as also the hind tibiae in the middle, the tarsi 

 of middle and hind legs mostly paler, sordid yellowish, the chelar 

 claw yellow. Abdomen brownish-tinged near the base. 



Head moderately strongly transverse, lightly concave above, 

 dull with the appearance of very dense puncturation or shagreen- 

 ing, due to excessively dense reticulate surface rugulosity, as 

 seen under high powers of the microscope. Mesonotal constric- 

 tion and propodeum similarly sculptured and dull. Third an- 

 tennal joint equal to the fourth and fifth together, the fourth 

 about two and a half times the length of its greatest width. Prono- 

 ttim ovate, well rounded in front and at the sides, the transverse 

 impressed line hardlv visible, in front of this line sculptured like 

 the head, as also at the sides, but shining in the middle behind it, 

 where it is compressed and cariniform. Head and thorax with 

 short pale pubescence, the propodeiun posteriorly with very little 

 evidence of transverse wrinkles. Front trochanters short and 

 stout, dilating at once from the base, the femora very robust, 

 first and fourth tarsal joints subequal, the fifth beneath with 

 very long row of close-set hyaline lamellate denticles, which 

 reach to to articular cavity and convergent with these 

 towards the free extremity of the joint is a second row of about 

 7 or 8 stronger and more hyaline denticles, which are set wide 

 apart from one another. Chelar claw moderately curved, with 

 the usual armature of Jassid parasites. Abdomen dull, with very 

 minute reticulate rugulosity of the surface, pilose, and with very 

 faint, sparse punctures. Length about 4 mm. 



This species has no relationship with any of the preceding, 

 and will, no doubt, subsequently be separated generically. 



HAB. Nogales, Arizona ; a single female was bred in Hono- 

 lulu on January 17th, 1907 from a cocoon obtained from a large 

 dark Jassid nymph found on grass, the larval sac being placed 

 on the underside of the abdomen (2495). 



