159 



17 Ilyalopeplus pellucidus (Stal) 



Although only known so far from the Hawaiian Isles, this 

 species is hardly an endemic form, and may be looked for in 

 Australia or one of the Southern Isles. It is principally 

 attached to Hibiscus rosasinensis, at least in the Lowlands. 



The ultimate nymph is pale translucent greenish ; the vertex 

 has three purplish-red or sanguineous percurrent lines, (the 

 outer ones sinuate) runining obscurely onto the pronotum, 

 there is also a lateral percurrent line on the gula. The anten- 

 nae have the apical third of the second, third and fourth seg- 

 ments purplish-red (or pinkish or blood-red) and the rest 

 is speckled with the same ; the form is as in the adult. La- 

 bium with the apex dark fuscous. The head and antennae 

 have black and yellow pilosity mixed, the nota and ter- 

 gites have short black bristly hairs. Beneath there are 

 golden yellow hairs. The hind femora and tibiae are 

 sparsely speckled with red. The head is shaped much 

 as in the adult, being about one-half wider than long, 

 the vertex is wider than the eyes together. The second 

 segment of the antennae is three times as long as the first and 

 nearly twice as long as the third, also twice and two-thirds as 

 long as the fourth. The labium reaches to the middle of the hind 

 co2.ie, the first segment being one-third longer than the second 

 and twice as long as the third, second and fourth subsequal. The 

 pronotum is a little longer than the head, and a little less long 

 than its apical width, the hind margin is about two-thirds wider 

 than the apical margin. The scutellum is rounded behind. There 

 is one odoriferous orifice on the basal margin of the fourth 

 tergite. The xyphus is angularly rounded behind, the coxae 

 are subcontiguous. 



Penultimate stage is very similar to the last, but of 

 course the tegmina are less developed. The labium 

 reaches nearly to the apical margin of the 2nd sternite, but 

 the actual length is the same as in the last instar, as also the 

 proportions, and it is the body which is shorter. The antennal 

 proportions are practically as in the ultimate instar ; the hind 

 margin of the pronotum is scarcely wider than the apical, and 

 is nearly one-half wider than its median length. 



Fam. Tetigoniidae. 



All known ova are inserted in leaves or stems. A general 

 summarv of the metamorphoses in this family is given in Bull. 

 Ent. H.S.P.A. L 274. 



