EXOCHUS. 279 



EXOCHUS. 



Exochus, Gravenhorst, Ichn. Europ. ii. p. 328; Cresson, Proc. Acad. Phil. 1873, p. 38. 



A genus apparently of no great extent, and chiefly known from the Palaearctic and 

 Nearctic Regions. 



A. Areolet wanting, 



1. Exochus stramineipes. (Tab. XI. fig. 7.) 



Niger, nitidus ; ore, facie, orbitis, palpis, tegulis, linea pronoti, mesopleuralis medio pedibusque, stramineis ; 



eoxis, trochanteribus femorumque posticorum basi, tibiarum posticarum basi tarsisque posterioribus, nigria ; 



alis fere hyalinis, nervis nigris. S • 

 Long. 8 millim. 



Hob. Panama, Volcan de Chiriqui 4000 to 6000 feet (Champion). 



Smooth, shining, almost impunctate, the abdomen at the apex sparsely pilose. 

 Antennae as long as the abdomen and metathorax together, moderately stout ; the first 

 joint large, somewhat pyriform, yellow on the lower side. Vertex raised in the centre, 

 the ocelli projecting; orbits broadly yellow, except in the middle behind. Mesonotum 

 flat, bearing shallow punctures; scutellum impunctate; the fovea at its base deep. 

 Metanotum bearing two carinae in the centre and one on either side at the edge ; this 

 latter bearing a short tubercle where the metanotum slopes down ; there is another 

 keel along the pleural region above the middle. Petiole depressed above at the basal 

 half, the depression bordered by fine keels, the remaining segments without keels. 

 Legs stout; hind coxae, the femora (especially), and tibiae, thickened. Wings obscure 

 smoky ; areolet wanting. 



2. Exochus puncticeps. 



Niger ; facie, palpis, linea pronoti, apice scutelli, postseutello pedibusque, flavo-rufis ; alis hyalinis, stigmate 



testaceo. d 1 . 

 Long. 7 millim. 



Bab. Mexico, Northern Sonora (Morrison). 



Antennae a little longer than the abdomen, brownish beneath, densely pilose ; third 

 joint about one fourth, longer than those succeeding, the two basal joints subequal. 

 Face broadly and roundly projecting, closely pilose, strongly punctured from the 

 antennae to the apex of the scutellum, which is shining and impunctate ; vertex shining, 

 depressed above the antennae ; the orbits are narrowly lined with yellow above the 

 antennae. Mesonotum closely punctured, scarcely shining ; scutellum impunctate, its 

 apex and the sides broadly to near the base, yellow ; pleurae and sternum shining, the 

 pleurae in front obscurely punctured. Metanotum opaque, aciculate, except the centre 

 and apex; there are eight areae; supramedian area longer than broad, the apex pro- 

 duced into an angle in the middle ; metapleurae shining, impunctate ; the metanotum 



