TKYPOXYLON. 43 



middle, covered with a white pile ; the third joint fully one half longer than the fourth, 

 the last longer than the penultimate. Head covered with golden pubescence, very 

 densely on the face, clypeus, and eye-incision, sparsely on the vertex ; the latter aluta- 

 ceous, projecting broadly, widely furrowed behind the ocelli, and with a transverse keel 

 in the middle, it being also keeled in the centre, and almost perpendicular below the 

 transverse keel. Eyes at the top separated by fully the length of the third antennal 

 joint. Clypeus broadly keeled down the middle, the apex projecting. Mandibles densely 

 pilose, blackish at the tips. Thorax densely covered all over (except on the centre of 

 the mesonotum, scutellum, and metanotum) with golden pubescence. Pronotum keeled 

 in the middle ; mesonotum minutely punctured ; the metanotum transversely striated, 

 and with a wide furrow in the apical half. Abdomen about one fourth longer than 

 the head and thorax united ; the basal three segments blackish at the apex above, and 

 almost bare, the other segments (especially the apical) covered with golden pubescence. 

 The legs bear a pale pubescence ; the hind femora are infuscated above. 



B. Metanotum broadly and deeply furrowed throughout ; abdomen and legs for the 



greater part fulvous. (Species 10.) 



v 10. Trypoxylon balteatum. (Tab. IV. figg. 4, 4 a.) 



Nigrum, aureo-hirtum, basi antennarum late, clypeo, tegulis, abdominis segmentis l°-3 m pedibusque fulvis - r 



alis flavo-hyalinis, nervis testaceis. $ . 

 Long. 13millim. 



Hab. Mexico, Atoyac in Vera Cruz (H. H. Smith, May 1888). 



Antennae bearing a white microscopic down ; joints 1-4 and part of 5 fulvous ; the 

 third joint nearly twice the length of the fourth. Front and vertex alutaceous and 

 bearing scattered punctures ; the occiput, clypeus, the incision of the eyes, and the 

 inner orbits thickly covered with golden hair. Ocelli hardly forming a triangle ; the 

 anterior ocellus placed in a hollow and separated from the posterior ones by the curved 

 posterior margin of this hollow, from which runs a broad and deep furrow down the 

 front. Eyes above separated by about the length of the second and third antennal 

 joints united ; below by less than the length of the third. Clypeus slightly concave ; 

 the apex broadly rounded and projecting, the margin clearly separated. Thorax 

 shining, impunctate ; the pronotum, a stripe along either side of the mesonotum, one 

 on either side of the postscutellum and down the side of the metanotum thickly covered 

 with golden hair ; the pleura? uniformly covered with fulvous hair, which does not 

 form stripes or patches. Metathorax elongated, narrowed distinctly and gradually 

 towards the apex ; a broad and deep furrow in the centre above, divided into two where 

 the slope begins ; in the lower (and longer) part of the furrow are some transverse 

 keels. Abdomen shining, impunctate, the apical segments covered with a pale fulvous 

 down. The petiole has a black stripe above, and is more or less black at the apex 



gg2 



