412 
are the ones to be segregated. Two generic names are avail- 
able for this group of species: Prosaphelinus De Gregorio, 
1915, about which there is no doubt, and Aphytis Howard, 
1900, which by the original description was said to differ from 
A phelinus in having one less funicle joint. Mercet has already 
pointed out that Aphytis chilensis Howard in all probability 
is closely allied to his Aphelinus longiclavae, and therefore sim1- 
lar also to A. capitis Rust. I believe it is safe to conclude that 
Aphytis chilensis really has three funicle joints, with the first 
one very small and overlooked by Dr. Howard, and I therefore 
adopt this name for the group of the old genus Aphelinus con- 
taining the coccid-feeding species.* 
The two genera Aphelinus and Aphytis as here recognized 
have much in common but most of the species differ consider- 
ably in habitus. Aphelinus, at least typically, has a broad head 
and the body tapering behind it to the apex of the abdomen, 
but the essential generic difference lies in the ovipositor. This 
in Aphelinus is comparatively tenuous and is enclosed entirely 
by the ventrites so that in oviposition it is protruded backward 
in a more or less horizontal position. In Aphytis the head, 
thorax and abdomen do not differ greatly in width, and the ovi- 
positor is comparatively strong and entirely free, so that in 
oviposition it descends almost perpendicularly from near the 
base of the abdomen. 
Two Hawaiian species belong to Aphytis as here recognized, 
viz: Aphytis diaspidis (Howard) and A. limonus (Rust). 
TRICHOGRAM MATIDAE. 
Megaphragma new genus. 
Female. Head apparently very thin fronto-occipitally, the fronto- 
vertex somewhat wider than one-third of the whole head, the eyes large, 
the cheeks rather short, the sides of the head and the cheeks gibbously 
- convergent on the mouth. Ocelli apparently absent. Antennae (Fig. 7a) 
inserted very high on the face between the eyes, apparently rather nearer 

* Subsequent examination of the type of Aphytis chilensis in the Na- 
tional Museum does not lead me to change the above statement. Only 
two funicle joints are actually visible in the unique type, but the antennae 
are so folded beneath the head that an unobstructed view of the base of 
the funicle can not be obtained. 
