INTRODUCTION ciii 



in company with Asiracid hoppers, a small Capsid and Rediiviohis, and is likely to be 

 parasitic in the eggs of one of these Hemipterous insects. 



A species of Baeiis is found in wet places in the mountains, and no doubt will be 

 found to be parasitic in spiders" eggs, and could be bred from these. We have only 

 found single specimens of this minute insect, and they are generally lost from being 

 mixed up in the killing bottle with larger forms. 



Two allied genera Pseudobaeus and Dyscritobacus are described for insects occurring 

 in gardens in Honolulu, where they frequent foreign grasses in company with apodemic 

 insects, such as Rcdnviohis capsiforniis, Orthoea vincta, etc., but their habits are not 

 known. They are most likely parasitic in the eggs of .some of the insects occurring 

 with them. With these also occurs a species of Opisthacantha, doubtless an imported 

 species, now widely distributed. It is probably parasitic in eggs of grass-frequenting 

 Hemiptera, as it has been noticed in numbers in places too dry for the occurrence of 

 Orthoptera, but where Reduviolus, Orthoea and Nesomartis are found. Two species 

 of Calotcleia are also recent importations, one first appeared in 1903, the other still 

 later, in Honolulu. The genus Anteris, on the other hand, though itself apodemic, 

 contains only endemic species, true forest insects, the hosts of which are not known. 

 There are si.x described species, all excessively closely allied, and perhaps not all truly 

 distinct. It is possible that they parasitize the eggs of the Locustids of the genus 

 Brachymetopa, some of the species of which are unaccountably rare. 



Platvgasteridae. — A single species of Inostemma, no doubt introduced recently, 

 is the sole representative known of the above family. It has occurred only in the 

 vicinity of Honolulu. 



Proctotrvpidae. — A single species of Proctohypes is common on the higher 

 mountains of Maui and Molokai'. We have bred it from malodorous decaying fern- 

 stems, infested by the larvae of Drosophila, and other Diptera. It also frequents 

 Astelia veratroides, at the base of the leaves of which decaying vegetable matter 

 accumulates, and forms a breeding ground for small flies. 



DiAPRiiDAE. — The species of Phaenopria are endemic forest insects, and the 

 endemic genera, Zacraniiim and Platymischoides, seem to be derivatives of these. In 

 fact, I have described species of Ashmead's last-named genus, as simply flightless forms 

 of Phaenopria, considering the two hardly generically distinct. The species are no 

 doubt numerous in the islands, closely allied, and difficult to distinguish, and some of 

 them show considerable individual differences in the shape of the head. All (except 

 Zacranium, the habits of which are unknown) are parasitic on 'vinegar-flies' of the 

 genus Drosophila, from which several have been bred. Owing to sexual differences, 

 and the fact that closely allied species live in company, I have not been able to associate 



' It is also found on the other islands. 



