L.EM ARGUS. 298 



1. CECROPS LATREILLII. Tab. XXXIV, figs. 1, 2. 



CECROPS LATREILLII, Leach, Euc. Brit. Supp., i, t. 20, f. 1-5. 

 l.irmnri'J,-, An. s. Vert., edit. 1st, v, 138. 

 Latreille, Enc. ineth., t. 335, f. 3-9. 

 Desmarest, Cons, sur les Crust., 338, t. 50, f. 2. 

 Gnerin, Icon. Regue An. Crust., t. 35, f. 8. 

 M, Edwards, Hist. Nat. Crust., iii, 474. 



Description. This animal is about an inch long (the 

 female), and is of a pale horny colour. The frontal edge 

 of the carapace is deeply notched, as is also, in a less 

 degree, the lower margin of the elytraform appendage, 

 and the last thoracic segment of the body. The termi- 

 nating strong hooks of the foot-jaws are of a deep black 

 colour, contrasting strongly with the light horny colour 

 of the rest of the body. The male is not above one third 

 the size of the female. 



Had. On the Orihagoriscus nwlte, Kinsale, G. J. 

 Allman, Esq., August 1848. Dublin coast, R. Ball, Esq., 

 W. Thompson, Esq. Selsey Bill, near Bognor, Sussex, 

 August 1835-6 (?), G. Newport, Esq., British Museum. 

 Weymouth, Professor E. Forbes, and R. M'Andrew, Esq. 

 In all these instances they were taken from the sun-fish, 

 and adhering to the gills. 



Genus 2 L.EM ARGUS. 



L.EMARGUS, Ki-oyer, i, 500. 



J/. Edwards, Hist. Nat. Crust, iii, 471. 



C/Htrarfrr. Elytraform appendage of considerable size. 

 The feet are foliaceous and branchial. The upper seg- 

 ments of the thorax are distinct and small. 



Bibliographical History. Kroyer established the genus 

 in his ' Tidsskrift,' in 1838. Finding all the feet folia- 

 ceous and branchial, he considered it a sufficient character 

 to separate the species from Cecrops, to which it is so 

 nearly allied, and form it into a distinct genus. M. 



