58 HYMENOPTEEA. 



9. Notogonia argenticauda. (Tab. IV. flg. 15, <? .) 



Nigra, facie apiceque metanoti longe argenteo-pilosis ; area pygidiali pube argentea obtecta : oculis in vertice 



lougitudine antennarum articulorum secundi et tertii inter se distantibus ; alis fere hyalinis. 

 Long, fere 13 millim. 



Hab. Mexico, Vera Cruz (H. H. Smith). 



Antennae stout, as long as the thorax; the joints gradually dilated towards the 

 middle ; the first joint longer than the second and third joints united ; the second joint 

 about three fourths of the length of the third, the latter shorter than the fourth. 

 Head semi-shining, strongly aciculate, the clypeus and face covered with short silvery 

 hair. Eyes at the top separated by the length of the second and third antennal joints 

 united. Clypeus broadly projecting in the middle and rounded at the apex, scarcely 

 keeled in the centre. Mandibles without teeth on the inner side. Thorax closely 

 covered with down, which varies in colour from silvery to fulvous ; alutaceous, the 

 metathorax much more coarsely so ; the apex of the latter hardly punctured, densely 

 clothed with hair laterally, and deeply furrowed in the centre. Abdomen elongate- 

 ovate, densely and broadly sericeous at the junction of the segments, but not in the 

 centre. Pygidial area bluntly truncated at the apex, covered with silvery hair ; beneath 

 shining, slightly punctured. The ventral surface bears a rufous down, and on the apex 

 of the second segment is a tuft of long rufous hair. Legs pruinose, the spines and 

 spurs black. Wings smoky-hyaline, from the base of the radial cellule fuscous ; the 

 second and third cubital cellules at the top subequal ; the recurrent nervures separated 

 by the length of the second cubital cellule at the top ; appendicular cellule complete. 



^ 10. Kotogonia apicipennis. (Tab. IV. figg. 16, $ ; 16 a, d .) 



Nigra ; area pygidiali pube cinerea obtecta ; oculis in vertice longitudine antennarum articuli tertii inter se 



distantibus ; alis flavis, apice fere fumatis. 

 Long. ( 6 ) 10 millim. ; ( $ ) 12-13 millim. 



Hab. Panama (Boucard). 



Antennae as long as the head and thorax united, rather densely microscopically 

 pilose; first joint distinctly longer than the second and third joints united, not carinate 

 beneath ; second joint becoming gradually, but slightly, thickened towards the apex 

 and fully half the length of the third, the latter equal in length to the fourth. Head 

 minutely punctured ; clypeus broadly rounded at the apex, scarcely projecting. Man- 

 dibles densely pilose at the base, the middle piceous, glabrous, impunctate. Front, face, 

 cheeks, and clypeus (except at the apex) densely covered with a close fulvous, mixed 

 with silvery, pubescence. Eyes separated at the top by the length of the third antennal 

 joint. Thorax opaque, minutely rugose ; a thick edging of fulvous hair along the sides 

 of the meso- and metanotum, and on the greater part of the apex of the latter ; meta- 

 notum finely rugose, scarcely furrowed in the centre, the middle segment semiperpen- 

 dicular and deeply, but not widely, furrowed in the centre. Abdomen narrower than, 



