826 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxi. 



a'. Body more depressed than in y7s>/a. Superior antennip short, with basal joints 

 not expanded. Epistome very small and narrow, Maxillipeds with palp 

 composed of only two joints. Anterior pair of legs with propodus more or less 

 expanded, dactylus forming a very largo and evenly curved hook. Front cov- 

 ering more or less the peduncle of the iirst pair of antenna". Flagellumof tirst 

 pairofantennsB composed of four to six articles. Abdomen relaxed..?. Bocinela. 



6. ^«GA Leach. 



ANALYTICAL KEY TO 8PECIKS OF .EGA. 



a. Eyes very small; second joint of first ]iair of antcun;i' without process at its 

 apex; terminal abdominal segment triangular, with rounded apex; inner 

 branch of uropoda with apex faintly arcuate obliquely. 



8. yEga microphthalma Dana. 

 a'. Eyes almost contiguous; second joint of first i)air of antenna" with a process at 

 its apex nearly as long as following joint; terminal abdominal segment with 

 its apex arcuate-truncate; inner branch of uropoda subtruncate. 



9. jE(ia lecontii (Dana). 



8. iEGA MICROPHTHALMA Dana. 



^lii/a microphthalma Daxa, Proc. Acad. Nat. .Sci. Phila., VII, 18.')4, p. 17fi.— Stimp- 

 soN, .lourn. Bos. Soc. Nat. Hist., VI, 1857, p. 68. 



Habitat. — Monterey, California. 



9. iEGA LECONTII (Dana). 



JEgacylla lecontii Dana, }»roc. Acad. Nat. Sci. Phila., VII, 1854, p. 177.— Stimp- 

 SON, Journ. Bos. Soc. Nat. Hist., VI, 1857, p. 69. 



Habitat. — California. 



Body elongate, oval; surface smooth ; color yellow, with a few brown 

 dots; eyes reddish brown. 



Head with anterior margin bisinuated, the median point separating 

 the basal joints of the first pair of antennae and extending one third the 

 length of these joints. Eyes large, oval, very close to- 

 gether at up[)er inner angle. First pair of antennie with 

 basal joints very large, dilated; second joint of peduncle 

 dilated, and with a process at its apex extending nearly 

 the length of the third joint; third joint very narrow, 

 about one-third the width of two preceding joints; llagel- 

 lum, composed of seven joints, extends the length of the 

 peduncle of second pair of antenu;e. Second ])air of nn- 

 teuuiv, with a tlagellum of twelve joints, extend almost to 

 the posterior margin of the first thoracic segment. 



The last four thoracic segments are each a little longer 

 than any of the first three. The epimera are narrow, with 

 Fio.r>.— jioALE rounded post lateral angles. 

 coNTii (DANA). rpj^g g^g abdominal segments are of equal length. The 

 terminal segment is subtriangular with truncate extrem- 

 ity; its posterior margin is creiuilate and fringed with hairs. The 

 uropoda exceed slightly the length of the abdomen. Tlie inner branch 



