326 NEOTROPICAL PSELAPHIDAE 



arcuate. This last segment is in reality covered with excessively fine, appressed 

 pubescence which gives a micro-strigoid appearance. Over the surface is spread 

 the flaky, dehydrated, pearly secretion noted previously. 



Antennae 0.87 mm. long; sexually modified in a qualitative sense; I 

 elongate-cylindrical; II smaller, elongate-cylindrical; III obconical, longer 

 than wide; IV and V shorter than third, quadrate-monilif orm ; VI-VIII grad- 

 ually transverse-moniliform ; last three segments forming a distinct club; IX 

 slightly longer than wide, rounded-trapezoidal; X larger, also slightly longer 

 than wide, obconical-trapezoidal, with an apically arcuate tooth at middle of 

 latero-ventral face; XI subovate, as long as the preceding two united or as 

 long as distal palpomere, having a straight sharp, apically directed spicule at 

 center of latero-ventral face, and a porous tubercle at apico-mesial face. Club 

 granular in addition to these sexual modifications. 



Pronotum simple with evenly convex disc; sides subparallel in basal half, 

 then converging to rounded apex; base with a strong arcuate transverse sulcus 

 which connects a large lateral fovea each side with the poorly formed median 

 fovea. This latter is small and deep and lies in a widening of the sulcus. 



Elytra each with two circular basal foveae, an entire sutural stria and a 

 broad discal impression extending for the basal half of elytral length. 



Abdomen with five visible tergites in a length ratio of 4/3.5/2.3/1.6/1.5 

 and the first three strongly margined. Last tergite tranversely trapezoidal, 

 with a nearly straight apical margin. 



Six stemites in a length ratio of 1.5/2.5/2. 5/1.8/1/.5 these being distinctly 

 concave medianly. The penis is exserted between terminal tergite and stemite, 

 assuring the sex of the holotype. 



Metastemum strongly tumid each side of a longitudinal sulcoid impression 

 and the apical margin is deeply, narrowly incised to enclose a narrow, cross- 

 striated tubercle of the first sternite. 



Intermediate coxae separated by one-fifth, and posterior coxae separated 

 by two-fifths the median metastemal length. 



Anterior trochanters each apically prolonged into a short, black, triangular 

 tooth ; posterior tibiae not spurred. Tarsi as for genus. 



Allotype Female. Substantially as for holotype save that (1) the tenth 

 and eleventh antennomeres are not toothed; (2) right mandible crossed dorsal 

 to left; (3) sternites more convex medianly; (5) anterior trochanters simple, 

 not dentate. 



Described on thirty specimens from Vera Cruz, Mexico, as follows: holo- 

 type, allotype, three male and two female paratypes from Cordoba (July 11, 

 1941, Henry Dybas) ; two male paratypes from Cordoba (July 20, 1936, C. 

 H. Seevers) ; two female paratypes from San Juan, 20 miles east of Cordoba at 

 1750 feet elevation (July 18, 1941, Henry Dybas) ; nine male and eight female 

 paratypes at Penuela (July 10, 1941, C. H. Seevers) ; one male and one female 

 paratype at Tezonapa (August 8, 1941, Henry Dybas). 



