346 NEOTROPICAL PSELAPHIDAE 



wider than first, slightly longer than wide, with truncate base and rounded apex. 



Pronotum with disc longitudinally gibbous and subcarinoid; base with a 

 broad, squamose, biarcuate, V-shaped sulcus. 



Elytra with oblique humeri. Each elytron with two squamose basal foveae, 

 an entire sutural stria, two entire dorsal striae, and a short humeral stria ; aris- 

 ing between the basal foveae is an entire, wide, flat costa which is limited each 

 side by an entire dorsal stria so that the elytral disc has one costa and two in- 

 tervals ; the outer interval is incomplete externally since the short humeral stria 

 is obsolete beyond the humeral elevation; the inner interval is complete being 

 bounded by the inner of the two dorsal striae and the sutural stria. 



Abdomen with five visible tergites in a length ratio of 3.5/3/2.5/1.5/2 with 

 the first three having wide, flat margins. The tergites are simple, not medianly 

 gibbous and without tubercles. Base of first and elytral margin, as well as lateral 

 articulations of first-second and second-third tergites, densely squamose. 



Six sternites in a length ratio of 2/3/2/1. 5/.5/1 with sternites well sepa- 

 rated. First wholly, and lateral articulations of second-third and third-fourth 

 sternites, densely squamose. 



Metastemum 0.335 mm. long, medianly sulcate, sulcal walls tumid. All 

 sternal foveae, the prosternum, the mesostemum, and lateral sternal sclerites 

 squamose. Intermediate coxae separated by one-fifth, and posterior coxae sepa- 

 rated by two-fifths, of the median metasternal length. 



Legs very long and slender, with the tarsi as described for tribe. The an- 

 terior femora are modified: each femur has the basal third of the anterior face 

 semi-circularly produced into a carinoid and stiffly setose lamina. 



Described from a single specimen from Corumba, Matto Grosso, Brazil. The 

 sex is probably male. This distinctive species is named in honor of the great 

 French expert, Achille Raffray. 



Achillei belongs in the first section of the genus by virtue of its entire dorsal 

 elytral striae, but has few afiinities with the species of the genus. The subcarinoid 

 pronotal disc, strial elytral pattern, simple tergites and antennomere proportions 

 at once separate it from others in the genus. To the author's mind it most closely 

 approaches gounellei of Brazil but the antennae of these two species are very 

 different, as well as the tergites. Thus gounellei has antennomere III, IV, and V 

 only slightly longer than wide, and VI twice as long as wide; achillei has III 

 quadrate, IV, V, and VI rapidly increasing in length. Gounellei has the tergites 

 obtusely gibbous medianly, and provided with three bundles of scales ; achillei 

 has simple tergites. 



The species may be listed as follows: 



achillei new species. Corumba, Matto Grosso, Brazil. 

 boliviensis Raffray. 1904. Yuracaris, Bolivia. 

 brevicomis Raffray. 1904. Minas Geraes, Brazil. 

 bruchi Raffray. 1908. Argentina. 

 gounellei Raffray. 1909. Rio de Janeiro, Brazil. 

 margaritaceus Raffray. 1891. San Esteban, Venezuela 



