58 Proceedings of the Biological Society of Washington. 



At first glance, might be confused with H. humeralis Say, but is amply 

 distinct in the form of the elytra. 



Hydnocera vicina, n. sp. 



Elongate, somewhat convex; aeneous black, elytra brown with testaceous 

 marking, antennae, palpi and legs dark testaceous. Head bronze, finely 

 and moderately densely punctured; pubescence not dense, depressed. 

 Eyes olive brown, moderately prominent. Thorax slightly broader than 

 long, (40-45), sides slightly dilated, lateral foveae nearly obsolete, apical 

 impression feeble, obsolete on disk, basal a broad groove; surface at sides 

 rugose-punctate, on disk nearly smooth with a few punctures, pubescence 

 moderately long, depressed but not dense. Scutellum black, pubescent. 

 Elytra nearly as long as abdomen, attenuate toward tips, suture closed to 

 apical third, tips separately rounded and coarsely serrate, tumid. Surface 

 coarsely and densely punctate, punctures slightly confused toward apices, 

 pubescence not dense, depressed. Color brown, each elytron with two 

 testaceous markings, the first basal, quadrate, outer apical angle rounded, 

 narrowly distant from suture but including humerus, the second shaped as 

 first but smaller, slightly post median. Underparts black, decidedly 

 bronzed, finely and densely punctured, very sparsely pubescent. Legs 

 testaceous, apex of femora, and hind tibiae infuscate. Length: 4.1 mm. 



Describeti from a unique specimen in the Wolcott collection, where the 

 type remains, collected at Esperanza Ranch, Brownsville, Tex., July 19, 

 1906 (Jagow). 



Closely related to Hyd. robiista Horn from which it may be separated by 

 the much less pubescent under surface, especially on the metapleurae, 

 and by the very different appearance of the prothorax, robusta Horn being 

 entirely covered with rather dense punctures. 



Hydnocera commixta, n. sp. 



Moderately elongate; aeneous, elytra black, legs piceous, anterior and 

 middle tibiae, all tarsi, antennae and mouth parts paler. Head aeneous, 

 finely and densely punctured, pubescence sparse and erect, eyes large and 

 convex. Thorax broader than long, (37-42), lateral dilations moderate, 

 foveae shallow, conspicuous, apical impression weak, broadly V-shaped, 

 apex of V directed posteriorly, basal impression distinct, surface coarsely 

 and not sparsely punctured, disk nearly smooth. Scutellum black, sparsely 

 pubescent. Elytra nearly as long as abdomen, attenuate toward tips, 

 which are slightly obliquely truncate, coarsely serrate except on truncation, 

 tumid. Surface coarsely, confluently punctured, pubescence sparse, 

 equally distributed, sub-erect, pale. Color uniform black. Underparts 

 slightly greenish black; mesosternum coarsely punctate, metasternum finely 

 rugose, metapleurae finely punctate. Sparsely pubescent. Legs piceous, 

 anterior and middle tibiae and all tarsi paler. Length: 4.5 mm. 



Type labeled "N. Y.-Sherman." Other specimens "Mass" and 

 "Drac[ut]-7-28-'10." Type in Wolcott collection, cotypc in Blanchard 

 collection at the Museum of Comjjarative Zoology, Harvard University, 

 with three other specimens. Somewhat of the appearance of Wolcottia 

 pedalis (Lee.) but distinguished l)y the more prominent eyes and more 

 coarsely punctate thorax. 



