12 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 



straight, or that of ninth a little bent forwards at ends but the corners 

 of none obliquely truncate. 



Ventral plates commonly roughened by transverse furrows of which 

 one toward the anterior edge and one toward the caudal are most dis- 

 tinct and of these two the caudal one commonly more deeply impressed. 



Tibial processes and segmentation of tarsi as in fulvicornis. 



Anal legs short; longer than antennae in ratio 12: 11, longer than 

 penult legs in ratio 3:2; body about 2.6 times longer. Tibia 4.5-5.5 

 times longer than thick; first tarsal joint 7-8 times longer than thick, 

 mostly 8 times longer; second tarsal joint 7.5 times longer than thick. 

 (See Plate 2, fig. 9). 



Coxal pores small, circular, nearly always 2, 3, 3, 3. 



Claw of female gonopods long, pointed, a little curved and concave 

 mesally as usual. Basal spines 2+2, rather stout, conical, somewhat 

 flattened distad and often bent ectad toward tips. 



Length 5-6.5 mm. 



Agenitalis Stage I. Body and head light brown, the latter dusky 

 or blackish at sides. Antennae and legs very light, brownish white. 



Ocellus distinct but pale. 



Antennae composed of 24 articles; distad of second article strictly 

 moniliform. 



Prosternal teeth small and pale; 3+3, the outer one minute, the 

 relations being the same as in the adult. 



Dorsal plates showing the transverse furrow very distinctly, the 

 lateral ones also being evident; the median elevated portion of plate 

 with a median and, on each side of it, another distinct longitudinal 

 sulcus. 



Coxal pores 1, 1, 1, 1. 



Anal glands very distinct. 



Gonopods appearing as short conical buds, already three jointed, 

 but with no trace of claw or basal spines and entirely lacking hairs. 



Length 3.4 mm. 



New Orleans, var. a. 



Pullus Stage IV. Coloration nearly as in the immaturus but a 

 little paler. 



Ocellus pale. 



Antennae in one specimen composed of 19 articles of which the 

 eleventh, twelfth, thirteenth, and sixteenth show signs of subdivision. 

 In a second specimen apparently slightly less advanced than the pre- 

 ceding, 15 articles are present in the right antenna, which seems to 

 be regenerating after a loss, and 20 on the left. Beyond second article 

 strictly moniliform. 



