62 HYMENOPTEKA. 



anterior femora with fulvous, hair ; tibiae densely pruinose, the spines and spurs rufous 

 tarsi with the spines pale rufous. 



4. Tachytes argentipes. /V ^^ q-^z.lk ^ v> i i ^i ^ 



Niger ; facie, clypeo thoraceque dense fulvo-argenteo-pilosis ; pedibus argenteo-pilosis ; alis hyalinis. 

 Long. 13 millim. 



Edb. Panama, Bugaba (Champion). 



Antennal scape covered with long pale fulvous hair ; the flagellum almost glabrous, 

 but pruinose under a strong lens; the third joint not much longer than the fourth. 

 Head opaque, alutaceous ; the clypeus, face, cheeks, and front covered densely with 

 fulvous hair, which has a slight silvery, or even golden, tinge ; the vertex and upper part 

 of the front much more sparsely covered with long black or fulvous-black hair. Vertex 

 depressed in the centre, the depression broadest at the apex ; there is a wide furrow 

 above the ocellus. The eyes at the top are separated at the narrowest part by a little 

 more than the length of the second and third antennal joints united. Clypeus rounded, 

 margined at the apex. Mandibles bearing long golden-fulvous hairs on the basal half, 

 the apical half reddish, with a black stripe down the middle. Thorax alutaceous, the 

 mesonotum finely punctured; the sternum, the lower and front part of the pleurae, 

 and the metapleurae densely covered with fulvous hair ; the pronotum sparsely covered 

 with long pale hair ; the mesonotum and middle segment with fuscous hair. Abdomen 

 nearly as long as the head and thorax united, and almost narrower at its widest part 

 than the latter, becoming gradually narrowed from the base of the second segment. 

 The petiole bears long fuscous hair ; the sides of the second and following segments, 

 and the three apical segments above, densely covered with moderately long fulvous hair. 

 Pygidial area densely covered with black (having in certain lights a fulvous tinge) 

 bristle-like depressed stiff pile, and with a few long black hairs ; the apex rounded* 

 without hair or bristles; beneath, the central part is impunctate, laterally bearing 

 scattered punctures. The other ventral segments have also scattered punctures and are 

 pale at the apex. Legs closely covered with silvery pile, the pile especially bright and 

 thick on the outer side of the tibiae ; the spurs and tarsal spines are bright fulvous ; 

 behind, the hind tibiae bear three rows of thick spines, but only the hinder row is 

 complete ; there are only two incomplete rows of spines on the middle pair, and in 

 front there are a few long flexible fulvous spines. 



5. Tachytes ornatipes. (Tab. IV. fig. 21.) 



Niger; mandibulis tarsisque rufis; facie metapleurisque longe argenteo-pilosis; area pygidiali pube aurea 



obtecta ; alis clare hyalinis. 

 Long. 10 millim. 



Edb. Guatemala, Paso Antonio 400 feet (Champion). 



Antennae stout, microscppicajly pilose ; the first joint with a rather long fringe of 



