of Exotic Hymenoptera. 79 



so, the setae on which are erect and narrowed at their base. The head 

 oblong-, and narrowed from the posterior margin to the base of the man- 

 dibles ; above, with two impressed oblique lines, which run upwards 

 and unite in the middle opposite to the insertion of the mandibles ; a 

 deeply impressed fovea above, in which is situated the anterior ocellus, 

 behind which is a deep curved depression which crosses the head ; the 

 mandibles produced, incrassate, and finely serrated on their inner mar- 

 gin; the scape of the antennae as long as the flagellum, broad and 

 flattened, widest at the base, and fringed on its anterior margin with a 

 row of white scales or setae ; the flagellum clavate. Thorax oblong, 

 transverse in front, narrowed behind; the metathorax truncate; the 

 wings brown. The first node of the abdomen oblong-quadrate, the 

 second somewhat bell-shaped; the abdomen subovate, pointed at its 

 apex and truncate at its base. 



Worker. The same length as the female, but of a more elongate 

 form ; densely covered all over with a coating of brown scales or setae ; 

 the head of the same form as in the female, but with the mandibles di- 

 lated and meeting only at their apex ; the nodes of the abdomen similar 

 to those of the female, but the basal one with a longer petiole. 

 Hab. Ega (Brazil). 



The worker of this species is figured in my ' Catalogue of the For- 

 middoe/ but the species was obtained too late to give a detailed de- 

 scription ; it will be found in my work under the name of Meranoplus 

 singidaris. 



Family Scoliadse, Leach. 



Genus Epomidtoptero]*, Romand. 



1. Epomidiopteron elegantulum. 



E. nigrum, nitidmn ; abdomine pulchre prismatico, supra plagis sex flavo 



maculato ; alis fuscis, violaceo-micantibus. 



Female. Length 9 lines. Black : the head and scape of the antenna? 

 shining ; the former punctured, closely and strongly so on the face, but 

 more finely and distantly on the vertex ; the flagellum opake, fulvous 

 beneath ; the scape fimbriated beneath. Thorax : the prothorax with ob- 

 long punctures ; the mesothorax with a few large punctures ; the scutel- 

 lum strongly punctured ; the metathorax opake, with a fine sericeous 

 pile ; smooth at the base, and with a few transverse ridges at the verge 

 of the truncation, the truncation striated, the striae radiating from the 

 centre ; the legs set with coarse rigid pubescence, the calcaria pale tes- 

 taceous, the pubescence on the tarsi pale ferruginous ; the post-scutellum 

 yellow ; the wings dark fuscous, with a violet iridescence. Abdomen 

 black, with a beautiful purple and violet iridescence ; the three basal 

 segments with a large ovate yellow macula on each side ; the apical 

 segment longitudinally striated, and with its posterior margin rounded 

 and rufo-piceous. 

 Hab. Mexico. In the National Collection. 



