104 HYMENOPTEKA. 



breast is finely punctured. Abdomen smooth, shining, 4 * twice as broad, or rather 

 high, as long ; the ventral surface and the sides are obscure brownish testaceous. 



2. LophyTOCera nigromaculata. (Tab. V. fig. 19, d; 19a,metathorax; 19 5, 

 scutellum.) 



Brunneo-testacea ; capite maculisque thoracis nigris ; petiole et pedibus flavo-testaceis ; alis hyalinis. 

 Long. 5|- millim. 



ffab. Nicaeagua, Chontales (Jansori). 



The vertex is longitudinally and the face transversely striated. From each antenna a 

 broad and deep groove runs to the clypeus ; the head has a distinct border behind. 

 Antennae long and of nearly uniform thickness ; scape very short, being scarcely double 

 the length of the ring ; third joint double the length of the fourth. Thorax, and the 

 sternum and mesopleurse to near the top, covered with large and deep punctures. 

 Two longish, large, disk-shaped marks over the posterior legs, a mark in front of the 

 mesonotum, two large marks behind this uniting in the centre, a roundish small mark 

 outside of them, and touching them at their apex a somewhat triangular mark (which 

 is prolonged as a broad line to the end of the scutellum, where it becomes broad), all 

 black ; the lower side of the metanotum is also black. The scutellum ends at the apex 

 in two blunt teeth, which are twice as long as broad. The metapleurse bear five or six 

 large longitudinal striations, and at the side project into large blunt processes. Petiole 

 long and slender, longer than the hind femora. On the back the abdomen is obscure 

 black, and the rest of it is browner and darker in tint than the thorax. 



ORASEMA. 



Antennae 13-jointed, longish ; third and fourth joints subequal. Scutellum simple, a 

 transverse groove at the apex. Metathorax without tubercles. Petiole thickish, 

 cylindrical, three times longer than broad. 



The ovipositor (which is not exserted) is quite remarkable for its size and breadth, 

 the spiculse being as broad as in Cephus and many other sawflies. The borer is 

 toothed or indented at the apex (fig. 18 c), and the support becomes dilated towards 

 the apical part, the apex itself, however, being sharply pointed, much sharper than the 

 borer (fig. 18 e). The maxillary and labial palpi are both three-jointed, the middle 

 joint being in both cases the shortest (figs. 18, 18 a). 



In its simple scutellum this genus agrees with Psilogaster and with some of the 

 species of Stilbula (if S. volusus, Walker, is to be regarded as a Stilbula, for the 

 typical species has the scutellum bifid) ; but from S. volusus it differs in its simple 

 antennae in the male. The ovipositor is stronger built and broader than in any other 

 genus of Chalcididae known to me. 



The only species known was found by Mr. Champion on fallen timber near the holes 

 of xylophagous beetles. 



