42 HYMENOPTEEA. 



smoky, the band not extending beyond the middle of the cubital cellules. Tegulae 

 fuscous. The anterior legs are all more or less rufous beneath ; the four hind femora 

 beneath and the calcaria and claws are also rufous. 



Characteristic of this species is the short transverse keel in the centre of the front. 



. Trypoxylon Mvispina. 



Nigrum, cinereo-pilosum, fronte et vertice rugosis ; geniculis, basi abdominis segmento 2° spinisque, fulvis ; 



alis hyalinis, cellula marginali fumata. 

 Long. 10 millim. 



Hab. Mexico, Teapa in Tabasco (H. H. Smith, Feb. 1888). 



Antennae subclavate, covered with a dense pale pile ; the third joint about one 

 quarter longer than the fourth. Front and vertex uniformly, coarsely, and rugosely 

 punctured ; sparsely covered with a fuscous pubescence ; a shallow, but distinct, furrow 

 runs down from the ocelli ; the latter piceous in colour and separated from the eyes 

 by hardly the length of the second antennal joint. Eyes at the top separated by the 

 length of the third antennal joint. The front projects in the centre a little above 

 the antennae. Cheeks, face, and clypeus densely covered with silvery pubescence. 

 Mandibles reddish, the tips blackish. There is a narrow shallow furrow on the occiput 

 at the top. Clypeus slightly but broadly projecting, not carinate. Thorax shining ; 

 covered with shallow, distinctly separated punctures, and clothed with fuscous 

 pubescence ; the edges of the pronotum, the oblique furrow on the mesopleura, and 

 the apex and the sides of the metanotum covered densely with silvery pubescence ; the 

 sternum also bearing silvery pubescence. Metanotum finely transversely striated (indi- 

 stinctly so at the base), and with a wide hollow in the centre of the apical half, the 

 hollow having a fine furrow at its bottom. The two basal segments of the abdomen 

 shining and almost glabrous ; the others bearing a scattered short silvery pile, espe- 

 cially along the sides. Tibia? and tarsi densely covered with a short silvery pile ; the 

 spurs fulvous, the claws rufous. 



This species comes near to T. carinifrons, but may be known from it by the coarsely 

 rugose head, which wants the transverse keel on the front, the clypeus not carinate, the 

 punctuation on the thorax covering a wider space, the wings much darker, and with 

 the stigma dark fuscous, and the entirely black antennas. 



b. Abdomen and legs for the greater part fulvous. 

 4 9. Trypoxylon fulvipes. (Tab. IV. fig. 3.) 



Nigrum, aureo-hirtum, antennis, abdomine pedibusque fulvis ; alis hyalinis, stigmate testaceo, nervis fuscis. 2 ■ 

 Long. 12 millim. 



Hab. Panama, Bugaba (Champion). 



Antennae as long as the head and thorax united ; blackish, broadly so beyond the 



