436 



BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



CyECIDOTEA NICKAJACKENSIS Packard. 



nickajackensis PACKARD, Amer. Naturalist, XV, 1881, p. 879. UNDER- 

 WOOD, Bull. State Lab. Nat. Hist., II, 1886, p. 359. RICHARDSON, Amer. 

 Naturalist, XXXIV, 1900, pp. 297-298. HAY, Proc. V. S. Nat. Mus., XXV, 

 1903, pp. 426-429. 



Localities. Tennessee; Metealf, Georgia. 



Body narrow, elongate, about seven times 

 longer than wide, 1 mm. : T mm. 



Head wider than long, with the anterior mar- 

 gin excavate. Sides of head entire. Eyes ab- 

 sent. First pair of antennae with the first article 

 about twice as long as broad; second article a 

 little longer than the first; third article one- 

 third the length of the second. The flagellum 

 is composed of nine articles. The second pair 

 of antenna; have the first two articles short and 

 about equal in length; the third is about one- 

 half the length of the second; the fourth is as 

 long as the first three taken together; the fifth 

 is one and a half times as long as the fourth. The 

 flagellum is composed of 

 fifty-three articles, and is 

 3 mm. long. The palp 

 of the maxilliped is com- 

 posed of five articles. 

 The mandible has a palp 

 of three articles. 



The first four segments 

 of the thorax are about 

 equal in length. The fifth 

 is a little shorter. The 



sixth and seventh are about one and a half 

 times longer than the fifth. The first three 

 segments have the epimera present as a very 

 small and almost inconspicuous lobe situated on 

 the anterior part of the lateral margin. The 

 fourth segment has the epimeron situated about 

 the middle of the lateral margin. The last 

 three segments have the epimera posteriorly 

 situated. 



The abdomen is composed of three segments; two short ones, sub- 

 equal in length, anterior to the long, terminal one. The terminal seg- 

 ment is about twice as long as wide, 1 mm. : 2 mm. It is subquadrate 

 in shape, with the post-lateral angles rounded and a very slight indi- 

 cation of a median lobe. The uropoda are shorter than the terminal 



Fl. 493. C<ECIDOTEA NICKA- 



.IACKEXSIS (AFTER HAY). 

 METCALK, GEORGIA, SPECI- 

 MEN. 



FIG. 494. C.SCIDOTEA NICKA- 

 JACKENSIS (AFTER PACK- 

 ARD), a, FIRST ANTENNA. 

 6, UROPODA. 



