242 HYMENOPTEEA. 



pile ; third joint much longer than the fourth. Clypeus rounded at the apex, projecting, 

 reddish, as also are the palpi; mandibles reddish yellow, the apices piceous; frontal 

 spine 2-| times longer than broad, obtuse at the apex. Transverse keel on the meta- 

 thorax large, sharp, turned a little upwards in the middle ; above it is a large, some- 

 what triangular depression (broadest at the base) which is a little raised in the centre. 

 Tubercles large, a little curved, indistinctly keeled on the sides above, and hollowed at 

 the base, compressed laterally towards the apex. Between the tubercles are three, not 

 very distinct, longitudinal carinae. The sides of the metathorax are obscurely punctured. 

 Petiole curved, a little longer than the second segment. Areolet longer than broad, 

 the outer nervure distinct. 



The male has the antennae longer than in the female ; the thorax is not so shining, 

 being almost aciculate, and the clypeus is yellowish. 



This species is closely related to P. atriceps, which differs from it in having the hind 

 tibiae yellow, the wings hyaline, the basal margin of the third and following abdominal 

 segments blackish. The tubercles on P. atriceps are described as " robust and obtuse." 

 P. nigriceps, Brulle (from Brazil), also agrees with the present species in coloration, 

 except that the keels in front of the scutellum are yellow, and the legs pale yellow, 

 while the metathoracic tubercles are short and conical, the upper region, too, having 

 two tubercles ; P. curvispina is readily distinguished from it by the large areolet and 

 clear hyaline wings. 



31. Polycyrtus chiriquensis. 



Ferrugineus ; antenms, vertice, pronoto mesonotoque (scutello excepto), nigris ; facie, orbitis, linea pronoti, 



lineis 2 mesonoti annuloque antenrtarum, flavis ; alis hyalinis, stigmate nigro-fusco. § . 

 Long. 14 millim. ; terebra 5 millim. 



Eab. Panama, Volcan de Chiriqui 2000 to 5000 feet {Champion). 



Smooth, shining, impunctate. Antennae stout, a little longer than the body, closely 

 pilose. The head is yellow, except behind, a small conical mark below the antennae, 

 and the vertex in the centre ; clypeus scarcely transverse, the sides rounded, the foveae 

 deep ; tips of the mandibles black ; the frontal spine moderately long and acute. The 

 lower part of the prothorax is ferruginous ; the edges broadly lined with yellow. On 

 the mesonotum the middle lobe is bounded by yellow at the apex. Scutellar carinae 

 yellow. The metanotum is slightly depressed in the middle at the base ; the transverse 

 keel is not very well developed, and is a little curved up in the middle. Tubercles 

 short (not being much longer than broad), and obtuse at the apex. Abdomen shining, 

 impunctate ; ovipositor scarcely half its length, the sheath black, pilose. Legs longish, 

 the tarsi inclining to yellowish. Areolet narrow, nearly twice as long as wide, closed 

 at the apex, the outer nervure nearly interstitial. 



A larger species than P. erythrosternus, and easily known from it by the yellow face, 

 entirely red scutellum, and much shorter and more obtuse metathoracic tubercles. 



