LIFE HISTORIES OP PHILIPPINE OASSIDID^. 263 



toward the anal segment, as in the larval stage. The whole dorsal 

 surface of the pupa is covered with numerous, small tubercles. The 

 stigmata are of moderate length. 



This species feeds on Premna vestita Seliauer. 



Pkioptera schumzei Weise (PI. VI, fig. 1). 



Prioptera sehultzei Weise, Philip. Journ. Sci. (1908), 3, 269. 



The egg-case of this species (PI. I, fig. 6) contains, as in P. 

 sinuata Oliv., only one egg and is somewhat similar in general appear- 

 ance to that of the species just described. It consists of a primary 

 layer fastened to the leaf, on which the egg is laid; it has an irregular, 

 thin, flattish cover over the whole with a curiously shaped, longitudinal 

 bar fastened on top of it. This longitudinal bar is pointed at one end 

 and on the other it runs out into several in-egular, iiat appendices. 

 Laterally it has a number of broad, raised crossbars. The whole structure 

 reminds one of the shape of the vertebral column. Some particles of 

 excrement are found on the egg-case. 



Larva: The larva of P. sehultzei Weise (PI. I, fig. 7) differs from that 

 of P. simiaia Oliv. in the following respects. The forked spines on the 

 prothoracic segment are straight and nearly perpendicular to each other ; 

 other spines on the pro-, meso- and metathoracic segments are straight, 

 being unlike those of P. sinuata Oliv. The latter species also has the 

 first pair of spines on the meso- and metathoracic segments developed 

 only as short tubercles ; in P. sehultzei Weise, these spines are well devel- 

 oped, straight, and nearly as long as the second pair. In P. sinuata 

 Oliv. the large subanal spines are curved in a peculiar way (PI. I, fig. 

 5, larval skin on pupa), although in P. sehultzei Weise they are curved 

 to form a loop coming in contact at the middle and then recurved again. 

 (PI. I, fig. 8.) The excremental shield of the larva of this species, 

 although in structure very similar to that of P. sinuata Oliv., is much 

 more solid, the long filaments more regularly arranged, and, as a whole, 

 the shield is more nearly circular. The color of this shield is not 

 black, as in the former species, but, with reference to age, older ex- 

 cremental filaments are darker gray than younger ones, which are some- 

 times even whitish. Shortly before pupating, the larva casts off the 

 excremental shield and as in P. sinuata Oliv. only the last larval exuvise 

 remain on the pupa. (PI. I, fig. 8.) The latter differs from that of 

 P. sinuata Oliv. in the following details : tubercles on the pronotum not 

 as strongly pronounced and shorter ; flat, spatulate hooks on the first and 

 second abdominal segments larger and more sharply curved; the pair on 

 the third segment very long and narrow, pointed, triangular and bent 

 toward the anal segment; the general color of the pupa is porcelain- 

 white, mesonotum light In-own; two small light-brown spots occur on 



