DIAPERINI NORTH OF MEXICO — TRIPLEHORN 409 



"Middle States" label, presumably from the original Haldeman series, 

 two labeled "Texas," and one labeled "Va." 



The type of P. crenatum LeConte (MCZ 4693) is a unique in the 

 cabinet of LeConte. It was taken at Haulover, Fla., on March 1. 



Specimens examined. — From the following localities, 154: 



United States: Alabama (Mobile, Monroeville). Arkansas (Hope, Ouachita 

 Mts., Lawrence Co.) . District of Columbia. Florida (Crescent City, Fernan- 

 dina Beach, Gainesville, Haulover, Orlando, Citrus Co.). Georgia (Adairsville, 

 Atlanta, Clayton, Dunwoody). Indiana (Crawford Co., Posey Co., Vigo Co.). 

 Iowa (Washington Co.). Kansas (Princeton). Louisiana (Opelousas, Winn- 

 field). Maryland (Baltimore, Bladensburg, Odenton, Sparrows Point). Mas- 

 sachusetts (Sherborn). Mississippi (Avera, Leakesville, Lucedale, New Augusta, 

 State Line). Missouri (Columbia, Creve Coeur, Hayden, New Hartford, Pike 

 Co.). New Jersey (Chadwicks, Ocean City, Vineland). New York (Rock- 

 away). North Carolina (Asheville, Tryon). Ohio. Pennsylvania. South 

 Carolina (Camden, Florence). Texas (College Station, Columbus, Daingcrfield, 

 Dallas, Davis Mts., Deweyville, Green Valley, Handley, Houston, Victoria, 

 Burleson Co., Burnet Co., Jackson Co.). Wisconsin (Dane Co.). 



Platydema snbcostatnm Laporte and Brull6 



Plates 2 (Fig. 11), 4 (Fig. 31) 



Platydema suhcostata Laporte and Brulle, 1831, p. 362. 



Platydema subcostatum Laporte and Brull6. — Horn, 1870, p. 384. — 'Blatchley, 1910, 



p. 1264. 

 Platydema clypeatum Haldeman, 1848, p. 102. 

 Platydema oblongulum Motschoulsky, 1873, p. 470 [new synonymy]. 



Description. — Body elongate oval, strongly convex, dark brown 

 to almost black, shining. Head uniformly convex between eyes, 

 coarsely and densely punctured, usually a few large, widely separated 

 punctures just above clypeus, antennae and mouthparts reddish 

 brown, terminal segment of maxillary palpus short, broadly trian- 

 gular; eyes moderate in size, convex dorsally, inner margin raised well 

 above plane of head, separated ventrally by a distance equal to from 

 2 to 3 times the longer axis of one eye. Pronotum transverse, sides 

 feebly arcuate, almost parallel, an elongate impression slightly behind 

 middle tapering toward base and apex, basal angles rectangular, 

 apical angles very broadly rounded, lateral marginal bead fine, sur- 

 face finely and sparsely, rather uniformly punctured ■v\ath a few well- 

 separated larger punctures in flattened lateral areas. Elytral striae 

 feebly impressed, finely punctured, intervals flat to subconvex, usu- 

 ally finely and rather densely punctured; elytral margins feebly 

 arcuate, nearly parallel, bead fine, slightly reflected. Prosternal 

 process broad and flat between coxae, its apex deflected, obtuse, not 

 prominent. Ventral surface of pronotum variously sculptiu-ed, 

 smooth to rugose, never with strong longitudinal ridges, metasternum 

 and basal three abdominal sternites coarsely and densely punctured; 



