552 



BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



is very minute. The second pair of antennte are composed of four 

 articles, tlie last article being also minute. 



The first four segments of the thorax have the lateral parts longer 

 than the middle of the dorsal region. The epimera of the first four 

 segments are placed on the anterior half of the lateral margin, lateral 

 to the ovarian bosses; the}^ are distinct and well developed on one side 



N 7 



Fig. 598.— Paraegeia ornata (After Hansen), a' Dorsal view op female. &, Ventral view 

 OF female, c, Leg of seventh pair of female, d, Leg of seventh pair of male, e, Heab 

 OF female (ventral view). /, Dorsal view of male. (/, Head of male (ventral view). 



of the body, but small on the opposite side. Ovarian bosses are pres- 

 ent on all the segments, occupying the anterior half of the lateral mar- 

 gin, and placed on the inner side of the epimera. Epimera are not 

 present on the last three segments of the thorax, and the ovarian 

 bosses occupy the entire upper portion of the lateral margin, l)eing 

 produced on one side of the body in large rounded lobes. The pos- 

 terior half of the lateral margin forms a large and conspicuous lobe 

 or expansion on all the segments. 



All six segments of the abdomen are distinct, and they gradually 

 decrease in size from the first to the last segment, which is rounded 

 posteriorly. The lateral parts of these segments are not developed. 

 The uropoda are simple and single-branched, and consist of two elon- 

 gated lamelhe attached to the sixth abdominal segment. There are five 

 pairs of double- branched pleopoda attached to the first five segments. 



