56 HYMEN OPTEEA. 



mandibles densely covered with a silvery pile ; the antenna? more slender, their scape 

 longer in proportion to the following two joints, and distinctly keeled beneath ; the 

 metathorax striated laterally, and the middle segment also bearing some stout striations ; 

 and the wings much lighter- coloured, not violaceous throughout. 



6. Notogonia tinctipennis. 



Nigra ; oculis dimidia longitudine antennarum articuli 3 1 distantibus ; alis fumato-hyalinis, apice late fusco- 



fumatis. 

 Long. 13 millim. 



Hab. Panama, Bugaba 800 to 1500 feet (Champion). 



Antenna? pruinose, longer than the head and thorax united ; the basal joint a little 

 longer than the second and third joints united, carinated beneath, the base contracted 

 on the lower side into a curve, the extreme base not projecting; second joint curved 

 and narrowed at the base beneath, about one third of the length of the third, the latter 

 almost as long as the fourth. Head covered with a silvery pile, which is very dense on 

 the clypeus and cheeks. Eyes at the top separated by one and a half times the length 

 of the second antennal joint. The depression on the vertex oval ; the furrow below the 

 ocellus about three times longer than broad ; the frontal depression with a keel in the 

 centre. Clypeus rounded, not incised, the apex shining, impunctate. Mandibles at 

 the base finely rugose, the apex piceous. Thorax covered with a sericeous pile, the pile 

 dense on the sternum and middle segment ; pro- and mesothorax aciculate ; metanotum 

 finely coriaceous, furrowed down the basal three fourths, the middle segment oblique, 

 furrowed ; scutellum shining, impunctate. Abdomen a little shorter than the thorax, 

 sericeous. Pygidium coriaceous, the pile and bristles blackish, the apex rounded ; the 

 apical two ventral segments punctured. Legs densely pruinose. The second cubital 

 cellule at the top the length of the space bounded by the first transverse cubital and 

 first recurrent nervures. 



A smaller species than N. argentifrons. The latter has the clypeus incised, the front 

 not keeled ; the middle segment striolated ; the wings hyaline ; the eyes at the top 



separated by nearly twice the length of the third antennal joint, &c. 



j 



7. Notogonia beata. (Tab. iv. fig. 13, <? .) 



Nigra, argenteo-pubescens ; clypeo facieque longe cinereo-hirtis ; area pygidiali truncata, pube cinerea 

 obtecta; oculis in vertice longitudine antennarum articuli seeundi et tertii inter se distantibus; alis 

 violaceo-hyalinis, apice fumatis. 



Long. 12 millim. 



Hab. Mexico, Orizaba (H. II. Smith & F. I). Godman, Dec. 1887). 



Antennas stout, covered with a pale microscopic down; the first joint not much 

 longer than the second and third joints united ; the third and fourth joints subequal. 

 Clypeus and cheeks densely covered with a silvery, the front and vertex with a short 

 fuscous, pubescence. Eyes at the top separated by nearly the length of the second and 



