548 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.59. 



and forms an angle with the ventral border. Prosternum in front of 

 coxae strongly concave. Mesothorax very small, separated from 

 metathorax by a strong constriction. Scutellum large, elongate, 

 trilobed, the posterior lobe much longer than the others. Metanotum 

 in profile convex in front, then shallowly concave, with a declivous 

 posterior surface separated from the basal part by a rounded angle; 

 from above, large, elongate, with convex sides and truncate posterior 

 border. Elytra apparently fused, suture nearly obsolete, indicated 

 by a faint impression; humeri subgibbous. Metasternum large and 

 convex. Abdomen with a slender, two-jointed petiole, nearly as 

 long as the posterior portion and separated from it by a constriction ; 

 posterior portion short and oval, dorsum with a feeble marginal line; 

 segments indistinctly separated. Tarsi 4-5-5 jointed. Legs long 

 and slender. Posterior femora strongly bent basally. Front and 

 middle coxae large, elongate and contiguous; posterior coxae 

 separated. 



Genotype. — Crematoxenus aenigma, new species. 



CREMATOXENUS AENIGMA, new species. 



Length, 4 mm. Color dark brownish red, shining, the pronotum, 

 metanotum, first segment of the petiole, the antennae, and legs less 

 so than the remainder. Posterior portion of pronotum and the elytra 

 (except the humeri) rather coarsely punctate, remainder of body and 

 the head sparsely and very finely punctate; antennae densely punc- 

 tate; legs shallowly punctate. Head, body, and legs with abundant 

 fine, yellow hairs, long and erect ones mingled with others shorter 

 and suberect. Antenna! funiculus with shorter and stiffer curved 

 hairs. Ventral surface of thorax finely punctate and sparsely pilose. 



Head a little longer than broad, sides convex. Clypeus broad, 

 very shallowly concave at anterior border. Labrum broader than 

 long and broadly rounded in front. Antennal scape about as long 

 as the following three joints together; funiculus slightly thickened 

 apically, all joints longer than broad, the first and second subequal 

 and longer and considerably more slender than the third and fourth; 

 joints five to nine each slightly longer than the one preceding; ter- 

 minal joint shorter than the two preceding joints together. Pro- 

 notum much narrower than head, broadest at anterior fourth where 

 it is twice as wide as at base, sides in front strongly convex, behind 

 feebly concave. Elytra together longer than broad and one-third 

 broader than pronotum, convex at sides, truncate behind, the de- 

 clivous posterior portion less than one-third as long as the basal 

 part. First segment of petiole longer than broad, about half as long 

 and distinctly broader than the second, second joint at base much 



