4U 



BULLpyriN .",4, UNITED STATP:s NATIONAL MltSEITM. 



sides of the head, halfwtiy between the anterior and the posterior 

 margins. TIk^ lateral margin of the head near the base is produced in 

 a small lol)e on either side. The first pair of antenns^ have tlie basal 



Fig. 477.— Asellus brevicauda (Aftki; Fcikises). a. IIanii of male, x 27. '/, OXE of first pair 



OF GENITAL PLATES OF MALE. X 51. r, OXE OF SE(U)NI) PAIR OF (JENITAL PLATES OF .MALE. X 2'). 



article short and broad; the second article is a little longer than the 

 lirst and more slender; the third article is about half as long as the 

 second. The Hagellum is composed of twelve articles. The tirst 



anteniue extend to the middle of the fifth 

 article of the peduncle of the second pair 

 of antenntv. The lirst three articles of the 

 second antenmv are short and subequal; tlie 

 fourth article is as long as the lirst three 

 together; the fifth is one and a half times 

 longer than the fourth. The flagellum is 

 composed of about seventy-five ai'ticles and 

 extends to the posterior margin of the fifth 

 thoracic segment and is 6 mm. long. The 

 maxillipeds have a palp of five articles. 

 The palp of the mandibles is composed of 

 three articles. 



The segments of the thorax are su])equal, 

 each being about 1 mm. in length. The 

 lateral margins of all the segments are 

 straight and entire. 



Epimora are present on the tirst segment 



only and are placed at the antero-lateral 



angles. 



The first two segments of the abdomen are short and visible only in 



the middle of the dorsal surface, being covered at the sides by the 



seventh thoracic s(>gment. The terminal segment is 4 mm. wide and 



3i nmi. long. The post-lateral angles are rounded and the posterior 



margin produced in a broadly rounded lobe between the uropoda. 



The ui-opoda are 2 mm. long. The peduncle is 1 mm. long and 1 



Fin, 



47S. — .\sELl.r; 



I'.RKVlCArDA. 



