THE INSECTS OF MACQUARIE ISLAND—TILLYARD—BRUES—LEA. 27 
APPENDIX A.-HYMENOPTERA. 
A NEW GENUS OF DIAPRITD FROM MACQUARIE ISLAND. 
By Cartes T. Brues, Bussey Institution, Harvard University. 
The Mawson Expedition to the Antarctic secured some specimens of apterous 
Diapriide among the few species of insects found on Macquarie Island. These were 
sent by Dr. R. J. Tillyard, who wished to include an account of them in his report on 
the insects from the Islands. . 
The specimens present no striking peculiarities at first glance, in fact are of 
quite generalised structure. I was surprised, therefore, to find on more careful examina- 
tion that they could hardly be placed in any genus previously characterised. In keys 
to genera they will run near Paramesius or Spilomicrus on account of the 13-jointed 
antennx, unarmed thorax, non-elongated face, gradually clavate antenne, &e. In 
the configuration of the head, thorax, and abdomen, however, they differ considerably 
as is evident from the generic description. With Malvina Cameron it probably has 
some affinities, although differing in the unarmed propodeum. I would be inclined to 
regard it as a primitive form, with the wings lost in response to its immediate environ- 
ment. 
ANTARCTOPRIA Gen. NOV. 
Head quadrate or somewhat transverse ; wide behind the eyes, not globose or 
subglobose; ocelli minute, in a small triangle; eyes small, clothed with sparse long 
hairs like those on the head; frontal prominence very distinct, but small; antenn 
13-jointed, gradually clavate, the club including five or six joints, first flagellar joint 
rather long, second to fifth small, moniliform; mandibles bidentate; maxillary palpi 
5-jointed; labials two or three, probable three. Thorax much narrower than the 
head, about three times as long as wide; prothorax simple, woolly in front, slightly 
visible above at middle; mesonotum punctate, without furrows; scutellum transverse, 
truncate behind, with a rather shallow furrow at the base ; tegule present; wings in 
the form of little hooks that reach only to the base of the propodeum. Propodeum 
short, nearly cylindrical, woolly, rugose, slightly raised to apex which is carinated and 
suddenly truncate. Abdomen large, oval, swollen, petiole extremely short, about 
one-third as wide as thorax and four times as broad as long; second segment occupying 
two-thirds of the abdomen, widest near apex, where it is nearly three times as broad as 
the throax; third to fifth segments rapidly narrowed ; following minute, forming the 
conical apex. Legs with the femora and tibiz clavate; claws slender, simple. Body 
clothed with sparse, rather long, glistening hair. 
