DIAPERINI NORTH OF ]MEXICO — TRIPLEHORN 427 



Oneco, Orlando, Ormond, Paradise Key, Punta Gorda, Royal Palm Park, Sara- 

 sota, Tampa, Highlands Co., Leon Co., Levy Co., Marion Co.). Georgia (At- 

 lanta, Barnes ville, Dallas, Dunwoody, Thomas ville, Tifton, Clarke Co.). Illinois 

 (Olive Branch). Indiana (Terre Haute, Posey Co., Putnam Co., Vigo Co., 

 Warren Co.). Kansas. Kentuckj^ (Taylor Co.). Louisiana (Baton Rouge, 

 Harahan, Logansport, New Orleans, Tallulah). Maryland (Hyattsville). Mis- 

 sissippi (Lucedale, Lula, Natchez, New Augusta, State College, State Line). 

 Missouri (Kansas City). New York. North Carolina (Chimney Rock). Ohio 

 (Tuppers Plains, Athens Co., Fairfield Co.). Oklahoma (Pearson, Tulsa). 

 South Carolina (Swansea). Tennessee (Nashville). Texas (Dallas, Harrisburg, 

 Houston, Jacksonville, Liberty, Longview). Virginia (Mount Vernon, Suffolk, 

 Nelson Co.). West Virginia (Weston). 



Platyderna wandae, new species 



Plate 5 (Fig. 32) 



Description.— -Large, broadly oval, moderately convex, dark 

 brown to black, dull in lustre. Head evenly arcuate in front, ante- 

 rior margin reddish, flattened between eyes, epistomal suture well 

 defined ; surface very finely and densely punctulate ; eyes large, convex, 

 deeply emarginate anteriorly, entirely flush with head surface medially, 

 separated ventrally by a distance of 1.2-1.5 times the longer axis of 

 one eye; mouthparts, antennae, legs, and entire ventral surface, in- 

 cluding epipleura, reddish brown ; terminal segment of maxillary palpus 

 short, narrowly triangular. Pronotum slightly more than twice as 

 broad as long, strongly narrowed from base to apex, sides uniformly 

 arcuate, scarcely margined, bead extremely fine and reflected, basal 

 angles rectangular, apical angles obtuse and narrowly rounded; 

 surface uniformly minutely and sparsely, usually indistinctly, punc- 

 tulate. Elytra evenly convex, sides broadly rounded, narrowly 

 margined, bead fine and strongly reflected; striae feebly or not at 

 all impressed, very finely punctured; intervals feebly convex to flat, 

 minutely but densely punctulate. Ventral surface of pronotum 

 concave, practicaUy smooth; prosternal process broad and flat between 

 coxae, horizontal, its apex prominent; metasternum and aU pleural 

 sclerites smooth with minute, widely spaced punctures; abdominal 

 sternites finely and sparsely punctured, especially lateraUy, each 

 with at least a faint lateral depression, particularly pronounced on 

 fourth sternite. Male aedeagus (pi. 5, fig. 32) lightly scelerotized, 

 apical sclerite acutely pointed, continuous at base with basal sclerite, 

 penis struts indistinct. Measurements: length: 5.1-7.8 mm.; width 

 3.2-4.9 mm. (holotype 6.5 mm., 4.2 mm.). 



Remarks. — This is the largest species of Platyderna to be found 

 north of the Rio Grande. Of the North American forms, it resem- 

 bles Platyderna ruficorne (Sturm) most closely, but, in addition to 

 its larger size, there are other noteworthy differences between the 



