588 STAPHYLINID. 
open behind, and the prosternal process laterally compressed and attaining the front of 
the mesosternum. The mandibles are rather long, and are each armed with three 
elongate teeth. The pseudo-terminal joint of the maxillary palpi is remarkably elon- 
gate and slender. ‘he head is constricted behind to form a narrow very abrupt 
neck. The front tarsi are quite simple. The hind tarsi are quite slender; the 
basal joint elongate, equal to the second and third together; the fourth joint is quite 
half the length of, though scarcely broader than, the terminal one, and prolonged 
beneath it in the form of a slender lobe closely adapted to the joint, and therefore almost 
invisible from above. 
I am not acquainted with any other species of the genus than those here described. 
1. Suniotrichus capillaris. (Tab. XV. fig. 10.) 
Ferrugineo-brunneus, antennis, palpis pedibusque testaceis, illis nigro-setosis; obsolete punctatus, subopacus ; 
capite subquadrato, posterius emarginato. 
Long. 53 millim. 
Hab. GuateMata, near the city (Champion). 
Antenne slender and rather short, furnished with elongate exserted black sete; first 
joint much stouter than the following. Head transversely subquadrate, the vertex 
broad, emarginate, the angles not rounded, the eyes placed at the front; surface almost 
unsculptured, dull. Thorax strongly transverse, narrowed behind, with the base 
rounded, and the front margin produced and rounded in the middle; quite dull, not 
visibly sculptured. Elytra longer than the thorax, closely and finely asperate-punctate, 
not quite so dull as the head and thorax. Hind body acuminate behind, excessively 
finely punctate. 
Found on the sandy banks of streams (Champion). 
2. Suniotrichus sordidus. 
Fusco-ferrugineus, pedibus palpisque testaceis; subtiliter granuloso-punctatus, subopacus; antennis longis, 
nigro-setosis, extrorsum pallide flavis ; capite suboblongo, posterius emarginato. 
Long. 54 millim. 
Hab. GuateMALA, Cerro Zunil 4000 to 5000 feet (Champion). 
The antenne are dark at the base, with the apical joints sordid white, very slender, and 
furnished with very long hairs. The head is covered with a distinct granular punctuation, 
and the thorax with a very fine, dense granulation. The apices of the hind femora are 
infuscate. 
So far as I can judge from a single very decayed example, this, though allied to 
S. capillaris, is a quite distinct species. 
3. Suniotrichus puncticollis. 
Ferrugineus, sat nitidus, antennis, palpis pedibusque flavis, illis nigro-setosis ; capite subtransverso, vertice medio 
profundius emarginato; prothorace fortiter, irregulariter impresso-punctato. 
Long. 43 millim. 
