558 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 112 



has a large, thick apopysis, plus a large swollen verrucose area near 

 the middle of the proximal article of the antenna. Females usually 

 have conical lobes on the lateral sides of the thoracic segments. 



Color of living specimens: The males have no distinctive color 

 pattern. To the unaided eye they usually appear a translucent white 

 or yellowish white, rarely pinkish. 



Under low magnification the head is usually colorless, except for the 

 yellow hepatic caeca, which are visible through the integument, but 

 in some it is suffused with a faint green or bluish tinge. The eyes are 

 black. The antennule is colorless or faint yellow. The proximal 

 article of the antenna is white or yellow, usually more intensely yellow 

 on the median side; rarely it may be faint brown, blue green, or yellow- 

 ish pink. The distal article of the antenna is faint yellow and becomes 

 darker toward the tip and on the narrow borders. The ventral side 

 of the head and labrum ranges from pale yellow to pale blue, with a faint 

 stippling of minute green or blue dots. Internally, the labrum 

 contains large orange or brownish cells, visible through the integument. 



The thorax is typically colorless and lacking in colored cells or oil 

 globules. The corm and endopodite of the thoracic appendages are 

 dingy yellow, the other endites and exites colorless. 



The abdomen and cercopods are colorless, except for the posterior 

 half of the intestine, which appears as a greenish-brown or black 

 streak because of food residues. The genital segments are colorless, 

 except for the heavily chitinized spur and adjacent sinus on the 

 median side of the penes, which are yellow (fig. 4d). 



The females, to the unaided eye, appear nearly colorless except 

 for the dark yellow eggs in the ovisac, the brownish spots of the 

 cement glands, and the black intestine in the abdomen. 



The antennule is colorless. The antenna is usually colorless, but 

 sometimes is faintly yellow or orange on the anterior side. The 

 head is usually colorless except for the internal hepatic caeca, although 

 the dorsal side is sometimes a faint blue. The eyes are black. The 

 labrum may have a greenish or blue wash, and contains large, brownish 

 cells, discernible through the translucent integument. 



The dorsal and lateral sides of the thorax are colorless, except for 

 the dorsal bosses, which vary from yellow to brilliant orange. In- 

 ternally, large blue cells may accompany the intestine for the length 

 of the thorax, or may be present only in the posterior half. These 

 cells also occur along the ventral portions of the intersegmental sutures 

 of the thorax in some individuals. The thoracic appendages are 

 nearly colorless, although the corm is often a faint yellow. 



The wall of the ovisac is colorless or glassy, except for the lateral 

 outpocketings and adjacent area, which range from yellow to orange, 

 and in some individuals the colored areas merge on the ventral side 



