DELAVALIA. 45 



2. DELAVALIA REFLEX A, Brady and Robertson. PL LI, 



figs. 1 14. 



Delavalia reflexa, B. & R. Brit. Assoc. Report, p. 196, 1875. 



Anterior antennae (fig. 2) somewhat more slender 

 than in the preceding species, the last three joints 

 nearly equal in length, third, fourth, and fifth a little 

 larger ; both joints of the posterior antennas (fig. 4) are 

 very long and slender ; the inner branch composed of 

 three joints ; basal joint of the mandibular palp (fig. 5) 

 very long, giving origin near the middle to a small 

 1 -jointed branch, and at the extremity bearing another 

 long and attenuated 1 -jointed branch; both branches 

 setiferous at the apex. Maxillary palp (fig. 6) well 

 developed ; first segment of the anterior foot-jaw ex- 

 panded and crutch-shaped (fig. 7 a). Inner branch of 

 the first foot (fig. 9) shorter than the outer, second 

 joint widened at the apex, and only about half as long 

 as the first ; inner branches of the third and fourth 

 pairs nearly as long as the outer, that of the second 

 pair (fig. 10) much shorter. Basal joint of the fifth 

 foot in the female (fig. 11) short, broad, and bearing 

 four long marginal setae on the inner segment ; second 

 joint (11 a) oblong, subquadrate, and having four 

 moderately long terminal setae ; in the male the fifth 

 foot is atrophied (fig. 12), the first joint (a) having 

 only two setae and the second (b) being reduced to a 

 small unisetiferous lobe. Caudal segments as in D. 

 palustris ; anal operculum smooth. 



