CCXVl 



FAUNA HAWAIIENSIS 



than do the green males. It is interesting to notice that whereas in this species the 

 common form of male is brown and the female green, in all other species collected in 

 numbers both sexes are usually of the green form. In B. nitida var. punae, when 

 brown (or at least not green) varieties occur they are, I think, always of the female sex, 

 while in B. parvula the discoior form is nearly always of the male sex. B. nitida, 

 when molested, exhibits a curious posture, threatening and protective, shown on 

 pi. I, fig. T,d, Vol. II., but I cannot recall having noticed this behaviour in any other 

 species. 



The species of Banza are entirely nocturnal in their activities, resting by day on 

 their food-plants, and are usually very well concealed. They are not at all restricted in 

 their habitat, for the same species may be found on very numerous trees or plants, 

 e.g. B. parviila W. { — disco/or huj. op.) is common on Coi'dy/ine, various ferns, 

 Acacia koa, Metrosiderus, Pelea, Sti'aiissia, Freycinetia, etc. They are, however, 

 particularly partial to Cordy/ine, Freycinetia, and such plants as have the leaves closely 

 embracing the stem, thereby affording more perfect concealment, while frequently they 

 hide amongst masses of dead leaves, when a branch of a tree has died and the leaves 

 remain adherent to form a thick shelter. The young are also very numerous on soft 

 ferns and frequently conceal themselves beneath the leaves of Pelea, which curl up 

 around the edges and form a good hiding place. The eggs are found arranged in a 

 row at the bases of leaves of Cordylinc and Freycinetia, but they must certainly occur 

 also on ferns, Canna and other plants affected by the young. The latter in B. parvula 

 Walk, are more varied in colour than the adults, being green, testaceous, various shades 

 of brown, brownish crimson, etc., but the adults produced from these are extremely 

 uniform in comparison, being either true discolor form or true blackburni. The latter 

 rarely produces a variety of facial coloration, which to some extent may be looked on as 

 exhibiting partial characters of the discolor form. The males stridulate freely at night, 

 but it is difficult to locate the sound. The eggs are parasitized by a species of Enpelvius 

 of the Chalcids, and perhaps also by the Proctotrypids of the genus Anteris. Some of 

 the species of Banza seem to be extremely scarce, and I suspect that a great many 

 eggs are destroyed by parasites. Occasionally on Hawaii we have taken examples that 

 have clearly been seized by birds, but have escaped with mutilation. It is interesting 

 to notice that B. nitida pnnae sometimes saves its life by the loss of one or both of the 

 hind tibiae, which are perpendicularly elevated in its attitude of defence. 



Grylloidea. — Here belong the greater part of the species which form the endemic 

 Orthopterous fauna, for of nearly forty described species only five have been accidentally 

 introduced. These introduced forms are of very little interest. 



Grylhis junotabilis is one of the commonest of insects, but is not a forest insect, 

 being abundant on the lowlands and lower mountain elevations. We have found living 

 specimens in consignments of growing plants sent from other countries, showing thereby 



