2'22 



BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



pair of antenna^ are composed of ten articles, and extend to the middle 

 of the first thoracic segment. The maxillipeds have a palp of two 

 articles. The palp of the mandibles is composed of three articles. 



The first segment of the thorax is a little longer than any of the 

 three following segments; the last three segments are longer than any 



Fig. ii24.— Nerocila califormca (After Schicedte and Meinert). a, Lateral view, b, Adui-t 



FEMALE. C, YOU.NG P'EMALE. d, LATERAL VIEW, (ENLARGED. I 



of the three preceding segments and are al^out equal in length to the 

 first segment. The thorax is l)roadest at the sixth segment. The post- 

 lateral angles of only the last two segments ai'e pi-oduced, those of the 

 sixth segment ])eing very little produced, and those of the seventh seg- 

 ment not nmch produced. The epimera of all the segments, with the 

 exception of the first, are distinctly separated from the segments. The 



Fig. 2'A'S.— Nerocila <;ALiF(mNi(-'A. a, Maxilliped. x 27^ b. First maxilla, x 27^. c. IMandi- 

 BLE. X 51f. d, Seventh leg. x 9i. 



first three have the posterior extremities rounded; the extremities of 

 the last three are more acutely pointed. The epimera do not extend 

 beyond the posterior margins of the segments (and they extend to the 

 posterior margin) except in the last segment, where they almost reach 

 the extremity of the post-lateral angles. 



