tr 



52 HYMENOPTEKA. 



the furrow deeper than on the basal part, as well as a few coarse striations on the 

 edges. The depression on the mesopleurse below the wings is wide and deep. 

 Abdomen shining ; above with a sparse silvery pubescence at the apices of the 

 segments; beneath with a few, rather long, black hairs. Pygidium coarsely and 

 strongly punctured, and bearing a silvery pile and stout fulvous bristles ; the apex 

 rounded, beneath shining, covered with large scattered punctures, the base impunctate 

 and almost transverse. Penultimate segment on the lower side sparsely punctured. 

 Legs covered with a dull sericeous pile, pale at the base, fulvous to blackish or fuscous 

 at the apex of the tibia? and at the base of the tarsi. Wings deeply violaceous, of a 

 slightly lighter tint at the apex. Recurrent nervures united ; second cubital cellule 

 at the top about three fourths of the length of the third cellule at the top, and less 

 than the distance bounded by the first recurrent and first transverse cubital nervures, 

 the latter sharply angled above the middle, the upper portion being straight. 



^ 2. Hotogonia montezuma. 



, Nigra, opaca : oculis longitudme antennarum articuli secundi distantibus ; alis fusco-violaceis. 



1/ Long. 17 millim. 



y$ Hab. Mexico, Northern Sonora {Morrison). 



Antennae stout, scarcely the length of the thorax, covered with a close whitish pile ; 

 first joint (with pedicle) nearly as long as the second and third joints united, not much 

 dilated on the lower side ; second joint nearly half the length of the third, not much 

 dilated at the apex ; third joint, if anything, longer than the fourth. Eyes at the top 

 separated by less than the length of the third antennal joint. Head opaque; front, 

 face, and clypeus covered with a moderately long pile, the pile silvery on the front 

 and inclining to fulvous or brownish on the clypeus, it being especially long at the 

 sides of the latter. Clypeus broadly rounded, closely and rather strongly punctured ; 

 a broad, not clearly separated, keel down the centre ; its apex with a narrow incision. 

 Mandibles strongly striated at the base, aciculated at the middle, and bearing a few 

 longish hairs on the lower side, the median teeth sharply pointed. Thorax bearing a 

 short fuscous pile ; finely and very closely punctured, the pleurae and metathorax more 

 strongly than the mesothorax. Prothorax covered with a silvery pile; the fore part 

 depressed, not raised at the apex, and sunk well into the head, and situated at a much 

 lower level than the posterior portion. Mesonotum shining above; the pleurae and 

 metathorax opaque, much more strongly coriaceous. Furrow on the mesopleurse 

 narrow, reaching beyond the middle. Metanotum with a shallow depression in the 

 centre; middle segment deeply channelled, except at the top, where a triangular 

 raised part runs into the channel, and, as well as the metanotum, bearing a close whitish 

 pile. Abdomen sericeous, especially at the apices of the segments. Pygidium closely 

 rugose, covered with a dull pile and with fulvous bristles ; the apex truncated ; beneath, 

 as also the penultimate segment, sparsely punctured, the other ventral segments trans- 



