CCELIOXYS. 
267 
NATIVE SPECIES. 
1. conica, Linnseus, <f $ . 4-5 lines. 
quadridentata, Linnaeus, $. 
quadridentata, Kirby, . 
2. simplex, Nyland, J . 5 lines. 
conica, Kirby. 
conica , Curtis, viii. 349. 
Sponsa, Smith, <^. 
3. umbrina, Smith, $ 2 . 
4. rufescens, St. Fargeau, f . 4-6 lines. 
5. vectis, Curtis, $ . 5-6 lines. (Plate XII. fig. 
lc? ?0 
6. inermis, Kirbv. 
GENERAL OBSERVATIONS. 
This genus is named from kolXicl, belly , ofu?, acute, 
in application to the conical abdomen of the female. 
The insects of this genus are parasitical upon the genera 
Megachile and Saropoda. Thus, C. simplex infests M. 
circumcincta ; C. rufescens, 31. Willughbiella; C. vectis , 
31. maritima; and C. umbrina is parasitical on Saropoda 
bimaculata. Linnaeus, from the different appearance of 
the tvro sexes made two species of them, and from the cir¬ 
cumstance of his having described first the male as Apis 
quadridentata, this, by the law of priority, supersedes the 
name of C. conica as the name of the species, which is its 
female, and which he next described, and thus that sex, 
whose form Latreille adopted as typical of the genus, is in 
the series of species totally superseded and reduced to a 
synonym. The species of this genus are extremely dif¬ 
ficult to separate from each other, no tangible character 
presenting itself conspicuously, although the Swedish 
