THALESTRIS. 125 



3. THALESTEIS EUFOCINCTA, Norman (M.S.). PL LVII, 



figs. 19. 



Body elongated, slender ; rostrum very long, curved 

 and sharp ; anterior antennae 9 -jointed, the first joint 

 nearly as long as the following three ; inner branch of 

 the posterior antenna 2- jointed. Mouth organs large 

 and well developed; second foot-jaw (fig. 4) very similar 

 to those of the two preceding species ; first joint 

 setose on the outer margin ; inner margin of the hand 

 finely ciliated, nearly straight, and bearing a short 

 seta over the middle ; outer margin angulated and also 

 provided with a short median seta ; terminal claw 

 long, slender, and having three slender setse attached 

 near the base. First pair of feet (fig. 5) stronger and 

 more powerfully clawed than in T. my sis, but other- 

 wise very similar ; inner branch of the second pair in 

 the male (fig. 6) indistinctly 3 -jointed, the last two 

 joints being imperfectly separated ; apex armed with 

 one short crooked spine and two short setse; the 

 spines of the outer branch in all the swimming-feet 

 have strongly aculeate margins (fig. 6 a a). Inner 

 segment of the basal joint of the fifth foot in the 

 female (fig. 7) elongated, subtriangular, bearing five 

 setse on the inner margin ; second joint ovate ; distal 

 half of the outer margin four times indented and bear- 

 ing six setae of unequal lengths ; the margins of both 

 joints densely ciliated; in the male (fig. 8) the basal 

 joint is broad, its inner segment convex, but only 



