398 HYMENOPTEBA. 



1 (6) . Abdomen black. 



2 (3). Tarsi white cressoni. 



3 (2). Tarsi black. 



4 (5) . Mesopleurae red chiriguensis. 



5 (4). Mesopleurae black violaceipennis. 



6 (1). Abdomen reddish. 



7 (8) . Thorax more or less black albispina. 



8 (7) . Thorax entirely reddish. 



9(10). Head and hind tibiae black tibialis. 



10 (9). Head and hind tibiae red ferrugineus. 



/^ l. Agathis cressoni. (Tab. XVI. fig. 9, $ .) 



• Agathis albitarsis, Cresson, Proc. Acad. Phil. iv. p. 63 (1865) 1 (nee Brulle, 1840). 



Hal. Mexico, Valladolid in Yucatan (Gaumer); Nicaragua, Chontales (Janson); 

 Panama (Boucard). — Antilles, Cuba 1 . 



A specimen from Chontales has the anterior femora red. 



^X 2 - Agathis violaceipennis. (Tab. XVL fig. 8, $ .) 



Mger, nitidus, metathorace rufo ; alis violaceis. $ . 

 Long. 12 millim. ; terebra 4 millim. 



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



Antennae stout, tapering towards the apex, shorter than the thorax and abdomen 

 united; covered with a close microscopic pile, the basal joints of the scape with long 

 hair. Head not very shining, densely covered with fuscous hair ; front deeply excavated, 

 the excavation with a stout margin ; two keels running down from the ocelli, uniting at 

 the apex. Thorax with the middle lobe raised, a shallow, not very distinct, depression, 

 bordered by an obscure keel, in the centre of the lobe ; a row of short, stout keels 

 running down the hinder edge of the pronotum ; a stronger and broader keel on the 

 mesopleurae near the metapleurae ; some indistinct keels in the front of the mesopleurae, 

 this part having a longish fringe of white hair ; the sternum covered with pale hair ; a 

 deep and wide depression, divided in two by a stout keel, in front of the scutellum. 

 Metathorax long, its apex abrupt ; stoutly transversely keeled. Metanotum with two 

 keels in the centre, the keels uniting at the base but diverging towards the apex ; a 

 waved keel running from each side of the base and uniting with the central keels at 

 the apex; a keel immediately external to these, and, much nearer the edge, yet 

 another keel, the latter ending in a stout, leaf-like projection; the lower part of the 

 metapleurae coarsely reticulated. Abdomen shorter than the thorax, shining ; the 

 base of the petiole depressed, the sides channelled ; sheaths of the ovipositor black, 

 hairy. Legs pilose, the femora, coxae, and trochanters bearing long white hair; 

 strongly punctured. Wings deeply violaceous ; an irregular hyaline spot in the first 

 cubital cellule. 



