520 PROCEEDINGS OF THE NATIONAL MUSEUM. voi.xxiu. 



Family VIII. ^EGID.E. 



ANALYTICAL KEY TO THE GEXERA OF ^GID^. 



a. Body rather compact. Superior antennje short, with firyt two peduncular joints 

 more or less expanded. Epistome large, linguiform, projecting between the 

 bases of inferior antennae. Maxillipeds with palp composed of five joints. 

 Front separating the whole or a great part of the first article of the first pair 

 of antennte. Flagellum of first pair of antennae composed of many articles. 

 Abdomen compact 22. ^ga. 



a'. Body depressed. Superior antennae short, with basal joints not expanded. Epis- 

 tome very small and narrow. Maxillipeds with palp composed of only two 

 joints. Front covering more or less the peduncle of the first pair of antennae. 

 Flagellum of first pair of antennae composed of four to six articles. AVjdomen 

 relaxed. 

 h. Eyes present. Anterior pairs of legs with propodus more or less expanded, 

 dactylus forming a very large and evenly curved hook. Mandibles with the 

 cutting edge expanded inside to a linguiform lamella; palp well developed, 

 with basal joint much elongated. Abdomen not much narrower than 



thorax , 23. liocinela. 



b'. Eyes wanting. Anterior pairs of legs with propodus not expanded, dactylus 

 aljruptly curved in the middle and terminating in a very sharp point. 

 Mandil)les with the cutting edge simple, acuminate; palp of moderate length. 

 Abdomen abruptly narrower than the thorax; terminal segment very 

 large 24. Syscenus. 



22. ^^GA Leach. 



ANALYTICAL KEY TO THE SPECIES OF .EGA. 



n. Peduncle of the first pair of antennae plane or concave, joints fitting into each 

 other. Frontal lamina plane or concave. 

 h. Terminal segment of body pointed at extremity. 



c. Eyes distant 50. .E(ja psum ( Linnaeus) . 



&. Eyes contiguous 51. ^Ega antiUensis Schicedte and INIeinert. 



b^. Terminal segment of body not pointed at extremity. 

 c Terminal segment posteriorly bisinuate. Surface of segment smooth, without 



carinae 52. ^Ega ecnnnatu Richardson. 



c'. Terminal segment posteriorly emarginate or truncate. 

 d. Eyes contiguous. Terminal segment truncate.. 53. .7iV/« c/r// ('/«/(/ Liitken. 

 d'. Eyes distant. Terminal segment emarginate... 54. ^Ega loebbii {Gn^rvii) . 

 a'. Peduncle of the first pair of antennae well rounded and with joints compressed. 

 Frontal lamina convex or compressed and elevated. 

 b. Eyes contiguous, 

 c. Terminal segment of body whole, entire. 



55. /Ega tenwipes Schicedte and Meinert. 

 c\ Terminal segment of l)ody not whole or entire. 



(/. Terminal segment dentated 56. ^^a (7eH/«to Schicedte and Meinert. 



d\ Terminal segment incised 57. .Egn incisa Schioedte and Meinert. 



y. Eyes not contiguous. 

 f. Terminal segment linguate, incised posteriorly, obscurely sulcate. 



58. jEga arcfica Liitken. 

 c\ Terminal segment subtriangular, apex produced. 



d. Eyes minute, ovate. Terminal segment lightly carinated. 



59. yEga ventwsa M. Sars. 



d\ Eyes large, round, occupying greater part of head. Terminal segment not 



carinated 60. .Ega graciUpes Hansen. 



