STENUS. 665 
59. Stenus detector. 
Niger, parum nitidus; densissime fortiterque punctatus; antennis, palpis pedibusque flavis; capite latiore, 
evidenter excavato. 
Long. 5 millim. 
Hab. Panama, Bugaba, Tolé (Champion). 
Antenne and palpi very elongate. Head extremely broad, broader than the elytra, 
evidently excavated, scarcely visibly bisulcate, closely punctate. ‘Thorax very densely, 
deeply, and closely punctate, elongate, but much rounded at the sides. Elytra almost 
shorter than the thorax, very coarsely and densely punctured, subrugose. Hind body 
unusually coarsely punctured at the base, more finely so at the apex. Male with a 
moderately large excision of the last ventral plate. ‘Two examples. 
A distinct species allied to S. sagaz. 
60. Stenus guatemalenus. 
Elongatus, nigerrimus, nitidus, subtiliter albido-pubescens ; antennis, palpis pedibusque pallide flavis; dense 
punctatus; capite fere plano; abdomine segmento basali ad basin evidenter pubescente. 
Long. 5 millim. 
Hab. Guatemata, Cahabon 1000 feet (Champion). 
Antenne moderately long. Head broad, scarcely excavate, flat, rather sparingly 
punctured on the middle. Thorax very narrow, but distinctly curved at the sides; 
densely though not very coarsely punctured. lytra not longer than the thorax ; closely 
and coarsely punctured, more densely so at the extreme base. Hind body closely, mode- 
rately coarsely punctured. Male with a rather large excision on the last ventral plate. 
Unique. 
This species much resembles S. albipes, but makes an approximation in form and 
pubescence to S. sagax and its allies; the specimen is not in good preservation, and, if 
fresh, the pubescence might be greater. 
61. Stenus sagax. (Tab. XVII. fig. 16.) 
Niger, subzenescens, subtiliter albido-pubescens ; antennis, palpis pedibusque flavis ; dense punctatus ; elytris ad 
basin evidentius albido-pubescentibus. 
Long. 44 millim. 
Hab. Guatemata, Torola (Champion); Panama, Volcan de Chiriqui 4000 to 6000 feet 
(Champion). 
Antenne elongate. Head broad, with very prominent eyes, slightly excavate, flat, 
closely punctured. Thorax not twice as long as broad, a good deal curved at the sides ; 
coarsely and very densely punctured, almost rugose. LElytra along the suture about as 
long as the thorax, coarsely and densely punctured. Hind body rather densely, moderately 
coarsely punctured, the apical segments more finely so; each of the basal segments more 
BIOL. CENTR.-AMER., Coleopt., Vol. I. Pt. 2, December 1886. 4QQ 
