138 



SUPERFAMILY 2 NEPOIDEA. 



Families Nabidae, Gerridae, BeduvUdae, Nepidae, Macroce- 

 phalidae and Emcocephalidae. 



PHALAN^X 2 PAGIOPODA. 



SUPERFAMILY 1 MIBOIDEA. 



Pamilies Anthocoridae, Clmocoridae, Polyctenidae, Mi/ridae, 

 Dipsocoridae, and Aepophilidae. 



SUPERFAMILY 2 NOTONECTOIDEA. 



Families Acanthiidae, Ochteridae, Naucoridae, Belostomaiidae, 

 Corixidae and Notonedidae. 



The following notes are unfortunately very imperfect, but 

 as so many of the adult Hemiptera differ in colour, pattern 

 and form from their nymphal instars, it seems better to record 

 the known stages of some of those found in Hawaii than to 

 wait indefinitely for full data. The duration of the instars is 

 so variable here as to be of little value for reference, while such 

 details derived from forest dwellers in captivity at the coast- 

 line probably bear little relation to their free life. 



So little is known of Heteropterous Metamorphoses, that it 

 is scarcely possible to institute comparisons, but the following 

 facts seem of interest: 



1. Oechalia grisea is remarkably constant in general form 

 through all its stages, except the usual gradual lengthening ; the 

 lateral margins of the pronotum in the later stages are also 

 more or less laminate and roughly crenulate. The free first 

 segment of the labium, a character separating the Cimicinae 

 from the Pentatominae, is present in Oechalia at the first 

 instar. 



2. Coleotichus hlacJcbumiae has the usual Pentatomine 

 head-form in the nymphal instars, suddenly and considerably 

 altered in the adult. The piceous ground colour of the early 

 nymph stages, deepens to deep black by the fourth and alters 

 to indigo blue in the fifth, but the tergites in the adult are dead 

 black again, while the jewelled green and red head and prono- 

 tum bear little semblance to those of the nymphs. 



