374- Mr. P. Cameron on new Species of 



two basal joints of the niiddle tarsi, rutbus ; the front calcaria 

 rufous, the four liinder calcaria black. The first cloud in the 

 fore wings is at the transverse basal nervure ; the second 

 cloud is enclosed bj the first and third transverse cubital 

 nervures ; the second and third cubital cellules at the to]i 

 are as wide as the space bounded by the recurrent and the 

 transverse cubital nervures. 



In my arrangement of the species in the * Biologia Cen- 

 trali-Americana,' Hymen, ii. p. 182, 8. imitatrix should 

 follow 8, nivalis^ Cam. 



POMPILUS, Fabr. 



Pompilus ceres, sp. n. 



Niger, abdomine albo scx-maculalo ; alis fumatis, albo-trifasciatis. $ . 

 Long. 18 millim. 



IJol). Panama [Boucard). 



Antennae short, stout, covered with greyish pubescence. 



Head elongate in front, covered with a golden pubescence 



and with longish black hair ; the eyes sinuate at the top, 



only very slightly converging at the bottom. Pronotum more 



than twice the length of the head, densely covered with long 



black hair. The mcsonotum covered with long black hair, 



its base and the scutellum with pale golden jnibescence ; the 



apex of the scutellum with a distinct bordering keel, behind 



which it is covered with dense silvery ])ubesccnce at the sides, 



the central part being raised. The median segment velvety ; 



the centre indistinctly keeled j the apex oblique, its sides and 



apex bearing velvety pubescence. The pleuraj are covered 



with a silvery pile. I'he legs covered with a black pile; the 



four hinder calcaria white. Abdomen a little, but distinctly, 



longer than the head and thorax united ; the aj)cx of the first 



and second segments incised in the middle; the white marks 



on the second to the fourth segments become successively 



smaller, and there is a large oval white mark on the top of 



the ai)ical segment ; tiie ventral segments ai;e pruinose, the 



ajncal ones sparsely covered with long black hair. The wings 



are short, not reaching to the apex of the fifth abdominal 



segment. They are dark fuscous; there is an elongate white 



cloud under the costa, shortly in front of the transverse basal 



nervure, a broad band going com])letely across in front of and 



enclosing the lower part of the first transverse cubital nervure, 



and the extreme apex is also hyaline, but not so white as the 



oilier two clouds; both the transverse cubital nervures are 



curved and approach each other at the top ; the first recurrent 



