HERMANNIA BISTEIATA. 465 



of Canestrini and Fanzago's N. cirrosus and finds it to 

 be the same nymph. I rely on this statement for the 

 synonym. 



Colour of legs and a plate covering the anterior and 

 central parts of the ceplialothorax red-brown, rather 

 dark ; of the remainder of the body yellowish- 

 white. 



Texture of the above-mentioned plate and the legs 

 hard, chitinous, and rough ; of the remainder of the 

 body leathery, finely dotted or granular. 



Cephalothorax. — As before stated, the rostrum and 

 the central part of the greater portion of the cephalo- 

 thorax are covered by a rough chitinous plate (not well 

 seen in very young specimens) which does not reach 

 the progaster. As far as this plate extends there is 

 not much difference from the adult, but the division 

 of the frons from the posterior part of the cephalo- 

 thorax is not so distinct. The rostral and lamellar 

 hairs (the latter omitted in the drawing) are like those 

 of the adult. The portion of the cephalothorax behind 

 and at the sides of the plate is very different from that 

 in the adult; it is soft, rather formless, not very clearly 

 divided from the abdomen, and I have not been able to 

 trace any pseudo-stigmatic organs or pseudo-stigmata. 

 This is interesting, the nymph being amphibious, con- 

 sidering that these organs are often absent or rudi- 

 mentary in aquatic species. What I suppose to be 

 the interlamellar hairs are smaller than in the adult. 



Legs very similar to those of the adult ; the tarsi 

 have three or four, short, strong spikes on their under 

 side, and there is a similar spike under each tibia. 



Abdomen bag-shaped, rounded posteriorly, and widest 

 near the posterior end ; it is apt to fold into slight, 

 irregular transverse wrinkles, which are not sharp nor 

 conspicuous. It is finely dotted all over, and the pos- 

 terior and lateral margins are bordered with thick 

 curved hairs. There are two longitudinal rows of 

 somewhat similar hairs on the notogaster (omitted in 

 the drawing) and a few small hairs on the progaster. 



VOL. II. 30 



