150 



: Orthoea ("^) 



The Hawaiian Isles now possess two immigrant species of 

 this genus, both from the Australasian Region. 0. nigriceps 

 has been established here for at least 30 years, while 0. 

 pacifica has been here for scarcely more than a sixth of that 

 time. This is interesting as showing that it is not impossible 

 for some of the ancient endemic genera to be polyphyletic. 



6 pacifica (Stal) 



The adult is frequently attracted by 'light' and was first 

 seen, I believe, at Waikiki in 1902 or 1903. It is common in 

 Australia and Fiji. I have not yet found the ova, but have 

 discovered the ultimate nymphs in my garden in Honolulu. 

 They run quickly and occur in Maniania grass (Cynodon 

 dactylon), though I do not think they feed on it. 



Last nymphal instar. Black, the main area of the pronotum 

 having a slight greenish metallic tint. Antennae coloured as 

 in the adult, except that the first three segments are often 

 suffused with blood-red; all four are only shortly and sparsely 

 hairy. The vertex is without greyish pubescence. The first 

 and fourth labial segments are blackish, the 2nd and 3rd yel- 

 lowish testaceous, sometimes more or less fuscate. The meso- 

 notum between the terminal pads is white, and the pads them- 

 selves are narrowly bordered externally with white. Th6 un- 

 derside is black, the pleurites both of tergites and sternites 

 sanguinescent, and both dorsally and ventrally there is a large 

 white opaque lateral spot a little apical of the apex of the 

 tegminal pads. Legs yellowish-testaceous, fore femora, apex 

 of middle femora, apical two-thirds of hind femora, apical two- 

 thirds of hind tibiae, etc., blackish. 



The head is as in the adult, but rather less convex and i^ 

 wider between the rather smaller eyes, the vertex at base being 

 one-half wider than the eyes together; the fourth segment of 

 the antennae is formed as in the adult and is a trifle more than 

 twice as long as third and three-fourths longer than the second, 

 which is twice as long as the first. The labium is robust and 

 reaches to the middle of the middle coxae. The first segment 



(29) Distant's Oriental genus Budaeus is based on a nymph of Orthoea 

 or a closely allied genus. Distant says his specimens are "apparently" 

 nymphs; judging from his figures, there is not the slightest doubt. 



