PTEROLOMA. 97 
PTEROLOMA. 
Pteroloma, Gyllenhal, Ins. Suee. iv. p. 418 (1827). 
Body elongate, in form somewhat resembling many species of Carabide. Head sessile, elongate in front. 
Thorax either subcordiform, or dilated towards the base. Scuéellum triangular. Llytra entire, generally 
long and striated. Antenne long and slender, rather moniliform, and slightly inerassated towards the 
apex; inserted beneath a small frontal plate; 11-jointed, with the third joint rather the longest, and 
the apical joint obliquely truncate. Palpi: maaillary long and slender, 4-jointed, 1 very small and 
short, 2 very long, slightly incrassated towards the apex, 3 of a similar form, but shorter, 4 elongate-oval, 
pointed at the apex; labial rather short and robust, widely divergent, with the apical joint incurved, 
3-jointed, 1 short and slender, 2 large and pyriform, with the apex truncate and furnished with a short 
seta at the outer angle, 3 shorter, obtusely oval. Zabrum very short and broad, obtusely bilobed, 
furnished with four long equidistant sete onthe anterior margin. Mandzébles rather long, robust, acutely 
pointed and armed with two strong sharp teeth below the apex. Maxille moderate, bilobed ; exterior lobe 
rather small, furnished with a long brush of setae at the apex; inner lobe sharply hooked at the apex, and 
furnished with long setw for more than halfway down its inner edge; stipes rather small, attenuated 
towards the base. Mentwm short, transverse, widest. at the base and rounded at the sides; submentum 
large, subquadrate, dilated at the base. Labiwm short, falcate at the apex, with the extremities acutely 
pointed, and furnished with very large and broad paraglossal plates. Lengua long and narrow, with its 
trifid extremity alone visible beyond the paraglossal plates. Prosternwin moderate; episterna rather 
large, triangular; epimera very small and indistinct; coxal cavities open behind, pyriform and contingent. 
Mesosternum rather large ; episterna moderate, not humeral ; epimera humeral, long, and oblique, extending 
to the coxal cavities; coxal cavities rather large, pyriform, not contingent. Metasternum moderate, not 
extending to the sides of the body ; episterna broad and short; epimera large, reaching beyond the coxe ; 
coxee large, pyriform, moderately distant, extending to the epimera. Venter long, composed of six 
segments of nearly equal length, each segment separately convex; apical segment in the male divided for 
its whole length in the middle, with each side separately rounded, and an arcuated suture extending from 
the middle of each side tothe base of the segment; the extremity of the last abdominal segment extending 
considerably beyond the emargination of the corresponding ventral segment. Legs long and slender ; tibie 
rather spinose, armed with many spurs at the apex ; tarsi 5-jointed, the anterior and intermediate pairs 
dilated in the males; claws simple. Cove: anterior contingent and prominent; intermediate narrowly 
separated, prominent ; posterior more widely separated. 
This genus contains a few species inhabiting the northern parts of Europe and 
America; one species is found at a high elevation in Mexico. 
1. Pteroloma sallzi, sp.n. (Tab. III. fig. 11.) 
‘Angustam, elongatum, nitidissimum, piceo-castaneum ; capite modico, antice elongato, deflexo, distincte et 
leviter punctato, impressionibus quatuor foveolatis inter oculos notato ; oculis modicis, sat prominentibus ; 
pronoto subcordato, quam caput haud longiore, vix latiore, antice latissimo, disco impunctato, glabro, depres- 
sionibus quatuor foveolatis impresso, postiee sat profunde punctato, lateribus sat late marginatis, margine 
ipsa sat profunde punctata, basi marginata, fere recta, angulis sat obtusis; elytris pronoto plus quam duplo 
longioribus, sat latioribus, pone media latissimis, profunde punctato-striatis, interstitiis glabris, nitidis, 
lateribus late marginatis, apice obtuso; pedibus atque antennis longis, gracilibus, castaneis. Long. corp. 
2} lin.=4°50 millim. 
Body narrow, elongate, dark castaneous, and very shining. Head moderate, elongate in front, deflexed, lightly 
but distinctly punctured, with four foveolate impressions between the eyes; eyes moderate, slightly 
prominent; antenne slender and very long. Thorax subcordate, broader but not longer than the head, 
widest anteriorly, disc smooth and impunctate, with four deep depressions in the middle, rather deeply 
punctured towards the base; sides rather broadly margined, with the margin itself punctured; base 
margined, nearly straight, with the angles rather obtuse. Seutellum moderate, triangular, impunctate. 
Elytra rather broader, and more than twiee longer than the thorax, widest behind the middle, deeply 
BIOL. CENTR.-AMER., Coleopt., Vol. II. Pt. 1, January 1888. O* 
