200 PROCEEDINGS OF THE ACADEMY OF [Part II 



chitinous arolium present between the bases of the rather stout, 

 simple, symmetrical tarsal claws. 



Leuropeltis atopa new species. Plate X, figures 11, 12 and 13. 



This species is so distinctive that a helpful comparison can hardly 

 be made with any known Blattid. The rich brown of the tegmina 

 and pronotal disk, pale lateral portions of the pronotum and bicol- 

 ored antennae, are the more striking features of coloration. 



Type: cf; Gourdonville, French Guiana. October. [Paris Mu- 

 seum.] 



We add the following features to those given in the generic diag- 

 nosis. Interocular space (1.1 mm.) three-quarters as wide as that 

 between the antennal sockets. Ocellar spots small. Inter-ocular- 

 ocellar area flattened, very weakly concave. Maxillary palpi with 

 distal joint equal in length to third, the dorsal margin showing a 

 very weak concavity, fourth joint three-quarters as long as third, 

 enlarging evenly and rather strongly distad. Pronotum with mar- 

 gin above head transverse, showing a very feeble convexity, caudal 

 margin transverse very broadly and weakly convex, lateral margins 

 evenly convex; first pair of impressions on disk situated slightly 

 cephalad of the median line and parallel to the normally placed latero- 

 caudal sulci. Tegmina with greatest width at apex of anal field, 

 thence narrowing very feebly to distal portion where the narrowing 

 is more decided, particularly on the sutural margin, with apex sit- 

 uated slightly beyond the median point toward the costal margin. 

 Wings with (12) thickened costal veins; ulnar vein with six branches, 

 two of which again divide before the margin of the wing. Sixth 

 tergite subchitinous in median portion, with a small, rounded prom- 

 inence mesad near the caudal margin of the preceding tergite, the 

 bases of which prominence latero-cephalad are supplied on each 

 side with a minute tuft of agglutinated hairs. Supra-anal plate 

 triangularly produced, with apex curving ventrad and broadly 

 rounded, length two-fifths distance between cereal bases. Cercus 

 with ten joints, the tenth moderately elongate oval.* Subgenital 

 plate moderately asymmetrical, the sinistral margin situated 

 further caudad than the dextral, straight, transverse to median 

 section; the dextral margin broadly concave oblique to median 

 section; median section with two large and roughly triangularly 

 rounded plates on each side, the sinistral more inset, due to the 

 position of the sinistral free margin, between these the median por- 

 tion of the plate is produced in a large, but no more produced, like- 

 wise roughly triangular plate, the emarginations between this and 

 the styles (developed into plates in this species) rather broadly V- 

 shaped. Ventro-cephalic margin of cephalic femora with (6 and 7) 

 short stout spines distad, ventro-caudal margin with (3) heavier, 



* The sinistral cercus is apparently deformed in the present specimen. 



