76 HYMENOPTERA. 



separated by a somewhat greater distance from each other than they are from the eye, 

 and by a greater distance from the eyes than they are from the front ocellus ; clypeus 

 transversely convex in the middle, the apex scarcely waved in the centre. Thorax 

 shining, the mesonotum, scutellum, and median segment with scattered, moderately 

 large punctures ; mesopleurae impunctate, rather densely pilose, the keel distinct ; the 

 ten keels on the median segment stout, rather widely separated, indistinctly margined ; 

 the apex of the median segment with a slight slope, keeled down the centre, and with 

 oblique keels running from the central keel near the end. Abdomen with the apical 

 half acutely pointed ; the basal two segments shining, impunctate, almost glabrous ; 

 the other segments closely and rather coarsely punctured and pilose ; the pygidial area 

 bearing large oblong punctures, closely pressed together at the apex, which is rounded ; 

 the sides are margined ; ventral segments punctured. Legs stout, pilose, covered with 

 a pale pubescence ; the tibial and tarsal spines and the calcaria white ; the hind tibiae 

 tuberculate on the outer side. The second cubital cellule at the top scarcely half the 

 length of the third, and slightly more than the space bounded by the recurrent 

 nervures ; the cubitus faint beyond the third cellule. 



V 9. Gorytes mexicanUS. (Tab. V. figg. 15; 15 a, head from in front; 15 b, 

 antenna.) 

 Niger ; thorace ragoso-punctato ; scapo anteonarum, clypeo, scutello,. fascias duabus abdominis tarsisque, runs ; 



alis fere hyalinis, anticis fulvo-fumatis, stigmate et nervis rufo-testaceis. $ . 

 Long. 11| millim. 



Hab. Mexico, Temax in North Yucatan (Gaumer). 



Head large, sharply retreating behind the eyes, and nearly as wide as the thorax. 

 Eyes parallel, the lateral ocelli separated from them by a rather greater distance than 

 they are separated from the front ocellus and by a less distance than they are from 

 each other ; ocellar region a little raised ; clypeus broadly projecting, the base with 

 large punctures, the apical half impunctate, the apex margined, hardly waved in the 

 middle; front and vertex opaque, alutaceous, and with scattered punctures, not 

 depressed, and without furrows or keels except an indistinct furrow below the ocelli ; 

 front, vertex, and occiput covered with a brownish pile ; immediately below and 

 between the antennae is a fringe of silvery hair ; the clypeus bears long fulvous hair. 

 Antennae thickened towards the apex; the basal joints of the flagellum greatly 

 elongated ; the third joint fully one quarter longer than the fourth. Thorax hardly 

 shining, sparsely pilose ; mesonotum and scutellum strongly and coarsely punctured ; 

 the mesopleurae more shining and less strongly punctured, the keel distinct ; the area 

 on the median segment triangular, 20-keeled, and margined ; the rest of the segment 

 shining, bearing scattered punctures ; the middle region irregularly reticulated longi- 

 tudinally and much more coarsely punctured than the sides; the pleurae shining, 

 obliquely hollowed in the centre, and sparsely punctured ; the extreme apex over the 



