GONATOPUS. 443 



b. Head and mesothorax shining, impunctate. 



5. Gonatopus dromedarius. (Tab. XIX. fig. 2.) 



Niger, nitidus, antennarum articulis 1°, 2°, 5°, 6° testaceis, pedibus rufis, coxis nigris, tarsis anticis apiceque 



coxarum albis, tarsis posticis pallide testaceis. $ . 

 Long. 6 millim. 



Eab. Panama, Volcan de Chiriqui 2500 to 4000 feet {Champion). 



Antennae slender, slightly thickened towards the apex; the third joint double the 

 length of the first. Head broad, shining, impunctate, moderately depressed above ; 

 the orbits of the eyes in front broadly obscure brownish ; the tips of the mandibles 

 piceous. Thorax shining; metanotum shining, striated, the striae widely separated. 

 The prothorax above rises into a broad hump behind; the posterior part of the 

 mesothorax and the anterior portion of the metathorax also form a hump. The 

 anterior neck-like part of the mesothorax is longer than the posterior part, the 

 posterior half being also white ; the raised margin separating the two is sharp and 

 distinct ; behind this the mesothorax, laterally, is striolated. 



6. G-onatopus apicalis. (Tab. XIX. fig. 4.) 



Niger, coxis subtus trochanteribusque albidis, ore, femoribus posterioribus subtus, genibus, tibiis posterioribus 



tarsisque pallide testaceis $ antennis testaceis, articulis 8°-10 m nigris. $ . 

 Long. 6*5 millim. 



Hah. Panama, Volcan de Chiriqui 3000 to 4000 feet (Champion). 



Antennae with the third joint not much longer than the fourth and fifth joints 

 together, the fourth a little longer than the fifth ; from the latter the joints are thicker 

 than the third and fourth ; the basal joint of the scape is black above, yellowish- 

 testaceous for the rest ; the basal joints of the flagellum are obscure fuscous above. 

 Head with the front flat, deeply excavated, margined, convex and almost perpendicular 

 behind ; smooth, shining, impunctate, bearing a few rather long hairs behind ; the face, 

 the inner orbits of the eyes to a little above the middle, and the lower part of the front 

 in the centre are obscure yellowish or whitish-testaceous. Thorax smooth, shining, 

 except the metathorax, the latter being transversely striated and the striations wide 

 apart ; the narrow front region of the mesothorax is more than double as long as 

 broad, margined at the sides, and bears two obtuse tubercles towards the middle ; the 

 pronotum and the mesothorax bear a few rather long white hairs, and the metanotum 

 is closely covered with similar hairs. The bases of the abdominal segments are faintly 

 punctured, opaque. Anterior coxae a little longer than the trochanters. 



3ll2 



