MESOLEIUS. 285 



along the top of the clypeus to the base of the mandibles), the clypeus, and the 

 mandibles (except at the apex), black ; labrum and palpi testaceous ; clypeus slightly 

 projecting, transverse at the apex. The pronotum in front, a mark on either side of 

 the mesonotum in front (close to the pronotum), the scutellum, the postscutellum, the 

 apical half of the metanotum, the tegulae, and the tubercles beneath them, yellow. 

 Abdomen not much longer than the head and thorax together ; petiole considerably 

 longer than the second segment (being nearly as long as the following two segments 

 together), faintly punctured, black, the apex and sides yellow ; the second, third, and 

 fourth segments black, yellow at the apex ; the apical segments obscure testaceous- 

 yellow, more or less blackish. The anterior legs incline to yellowish, the four posterior 

 femora have a more decided testaceous hue ; hind coxae marked with testaceous, running 

 into fulvous and yellow, the base black. Areolet broad ; the lateral nervures curved, 

 united above ; below, the recurrent nervure is received a little before the middle ; 

 stigma blackish at the top, testaceous on the lower side. 



2. Mesoleius zapotecus. 



Flavo-testaeeus ; vertice, medio pronoti, mesonoto, maculisque 2 metanoti, nigris ; facie, annulo antennarum, 



orbitis tarsisque, flavis ; alis fere hyalinis, stigmate testaeeo. $ . 

 Long. 11 millim. ; terebra fere 1 millim. 



Hab. Mexico (BilimeJc). 



Antennae stout, nearly as long as the thorax and abdomen together; brownish-black 

 above, the yellow ring broad ; the scape yellowish, black above ; the third joint more 

 than double the length of the fourth. Head yellow (except abroad black band in the 

 centre above the antennae, extending posteriorly, and a smaller one below the antennae, 

 not reaching to the centre of the face), obsoletely punctured ; the face projecting (but 

 not largely) in the centre ; the clypeus projecting, limited behind by a deep depression. 

 Thorax yellow, the centre of the pronotum, a line proceeding from a little behind the 

 tegulae under the fore wings down the side of the suture and bounding the mesopleura 

 in front, and the mesonotum (except two triangular yellow marks in front close to the 

 pronotum), black ; scutellum yellow ; metanotum yellow, a black mark (dilated at the 

 apex, and on each side at the base) and a smaller, more triangular, one at the apex in 

 the middle ; mesonotum opaque, finely punctured ; metathorax more strongly punctured. 

 Petiole broad, becoming gradually broader towards the apex, more than twice as long 

 as broad ; the sides furrowed (the lower side of the furrow bounded by a sharp keel) ; 

 finely punctured ; a broad transverse mark in the centre, the apex triangularly incised. 

 The other segments are yellow, banded with broad fuscous-black bands at the base ; 

 these bands, however, becoming much narrower towards the apex, which is entirely 

 yellow. The sheath of the ovipositor broad, testaceous, projecting. Wings hyaline, 

 suffused with a smoky tinge; the nervures testaceous; areolet triangular above, the 

 lower side projecting, angled. Legs longish ; the tips of the tarsi fuscous. 



