CEKOPALES.— PSEUD AGENIA. 161 



subhyaline, a band along the basal nervure and a broad one occupying the radial and 

 second and third cubital cellules fuscous. Head shining, finely and closely punctured ; 

 the orbits and clypeus bearing a short silvery pubescence ; the eyes scarcely arcuate at 

 the top ; the apex of the clypeus transverse, the sides rounded ; ocelli in a curve, the 

 hinder pair almost opposite the top of the eyes, and separated from each other by a 

 distinctly greater distance than they are from the eyes. Antennae covered with a close 

 pile; the apical joints curved; the third and fourth joints subequal; the scape 

 brownish beneath. Thorax aciculate, the median segment alutaceous ; the apex of the 

 pronotum broadly arcuate ; the scutellum narrowed towards the apex, where there is a 

 small white spot ; the median segment with a gradual rounded slope. Abdomen 

 sessile, shorter than the thorax. Legs stout, elongate; the tibiae and tarsi thickly 

 covered with a blackish pubescence ; the long spur of the hind tibiae reaches about the 

 length of the fourth tarsal joint from the apex. Radial cellule round to the apex of 

 the third cubital cellule, then lanceolate ; the second cubital cellule at the top slightly 

 longer, at the bottom shorter, than the third ; the third cellule at the top not half the 

 length of the bottom ; the first recurrent nervure is received before, the second a little 

 beyond, the middle. 



8. Ceropales apicipennis. (Tab. X. figg. 5, 6 organ ; 5 a, wing.) 

 Hab. Mexico, Jalisco {Schumann). 



Very similar in coloration and form to C. chiriquensis, but differing as follows : — The 

 clypeus is only white at the sides ; the mark on the scutellum is larger ; there is a 

 white mark on the metanotum ; the white band on the third segment is continuous ; 

 and there is no cloud at the basal nervure, while the apex of the wing is clouded from 

 near the base of the radial cellule. Easily known otherwise by the scutellum being 

 flatter and hardly narrowed towards the apex ; the long spur of the hind tibiae only 

 reaching a little beyond the middle of the metatarsus ; the tarsi not so closely or thickly 

 haired; the radial cellule deeper and rounded from the third cubital cellule (the 

 nervure in C. chiriquensis being straight, while here it is curved) ; the first recurrent 

 nervure received beyond the middle ; the pleurae more densely covered with a silvery 

 pubescence; and also by the somewhat larger size (nearly 11 millim.). 



PSEUDAGENIA. 



Pseudagenia, Kohl, Verh. zool.-bot. Ges. Wien, xxxiv., Abhandl. p. 42 (1884). 

 Agenia, Dahlbom, Hymen. Europ. i. p. 454 (nee Schiodte). 

 Pompilus, Smith, Cat. Hymen, iii. p. 118 (part.). 



a/ l. Pseudagenia cressoni. (Tab. X. fig. 6, thorax.) 



Nigra, fulvo-aureo hirta, basi antennarum, pedibus tegulisque rufo-fulvis, coxis, trochanteribus apiceque 



tarsorum nigris ; alis fere hyalinis, stigmate nigro. $ . 

 Long. 8-12 millim. 



biol. cente.-amee., Hymenopt, Vol. II., November 1891. yy 



