THREE NEW MYRMECOPHILOUS BEETLES. 



By William M. Mann. 



0/ the Bureau of Entomology, United States Department of Agriculture. 



The three species of ant-guests described below include a most 

 bizarre ecitophile of uncertain systematic affinities, taken in Mexico in 

 1913, a species of the genus Ecitophya from Brazil and a Fustiger 

 from Honduras, the latter the first of its subfamily from the Central 

 American region. 



Family STAPHYLINIDAE 



Subfamily Aleocharinae 



CKEMATOXENINI, new tribe. 



Near Myrmedoniini. Maxillary palpi, 4-jointed. Labial palpi, 

 3-jointed. Antennae 11-jointed, inserted in fronta] foveae separated 

 by a strong carina. Abdomen oval behind, in front constricted into 

 an elongate, 2-jointed pedicel. 



CREMATOXENUS, new genus. 



Moderate sized, myrmecoid species, strongly constricted between 

 pronotum and elytra. Head very thick in profile, extended behind 

 into a narrow neck. Eyes well developed, large and rather flat. 

 Maxillary palpi large, 4-jointed; first joint short; second elongate, 

 about half as long as the third, which is elongate, clavate, and circular 

 and nearly plane at tip; forth joint short and awl-shaped. Maxillary 

 lobes very large, the outer coarsely setigerous apically, the inner 

 with a row of fine hairs on the inner margin. Men turn large, concave 

 at anterior border. Ligula membraneous, apparently bilobed. 

 Labial palpi 3-jointed; basal joint short and thick; second and third 

 joints elongate, the second considerably thicker and nearly twice as 

 long as the third. Antennae situated on front of head in large circular 

 foveae which are separated by a strong, median carina; 11-jointed, 

 first joint scapiform, as long as the following three joints together. 

 Clypeus rather flat, nearly straight at anterior border. Mandibles 

 small and arcuate. Pronotum elongate, constricted behind, inflexed 

 nearly vertically at sides; in profile the anterior border is truncate 



Proceedings U. S. National Museum, Vol. 59— No. 2387. 



547 



