544 The Philippine Journal of Science 1922 
which he says lack definite areas. However this may be, there 
is considerable variation in the distinctness of the areolation due 
to depth of sculpture, and one of the species described below 
has some of the carine practically obliterated. Morley also ex- 
pressed doubt of the stability of the Cameronian species. In 
this he may be correct, but it seems hardly possible that indi- 
viduals differing so markedly as do the ones before me can rep- 
resent fewer species than listed. These include ten specimens 
from the Philippine Islands, eight collected by C. F. Baker and 
two by C.R. Jones. These apparently represent six species, none 
of which agrees with any of Cameron’s descriptions; one, how- 
ever, is apparently A. praepes (Bingham). Not all will agree 
with the original description of the genus, which is to be expected 
since the genus was based on a single species, and many purely 
specific characters were mentioned in the generic description. 
They fall, however, into three rather distinct groups, worthy 
perhaps of subgeneric rank. 
The following key will serve to separate the six species known 
from the Philippine Islands: 
Key to the Philippine species of Acanthojoppa. 
1. Propodeum with distinct apophyses; scutellum convex to pyramidal; 
pleura and propodeum sculptured; metapleurum not distinctly divided 
by a carina extending from middle to Wind COX. .....2...---.ssenen--neteecennsnee 2. 
Propodeum without distinct apophyses; scutellum flat or weakly convex; 
pleura and propodeum polished ; metapleurum divided by a sharp carina 
extending from middle to hind coxe ore 
2. Scutellum pyramidal and deeply emarginate at summit, nervulus post- 
furcal; malar space subequal to basal width of mandible; cheeks nearly 
flat; clypeus flat, not or barely separated; head not contrastingl 
colored 3. 
Scutellum convex, not emarginate at summit; nervulus interstitial ; 
malar space much shorter than basal width of mandible; cheeks 
strongly convex; clypeus elevated at base and distinctly separated; 
head contrastingly colored with yellow and ferruginous. 
A. praepes (Bingham). 
3. Flagellum largely black with a distinct white annulus........----..-----+---++--- 4, 
Flagellum testaceous at base, black at tip................ _ A. mindanao sp. nov. 
4. Vertex sunken below level of top of eyes; areola strongly longitudinally 
rugose, open behind; apophyses distinctly behind middle of propodeum. 
A. major sp. nov. 
Vertex about level with top of eyes; areola closed behind, not strongly 
rugose; apophyses nearly at middle of propodeum. 
A. annulicornis sp. nov. 
5. Hind tibia mostly fuscous, the tarsus yellow; areola longer than broad. 
A. polita sp. nov: 
Hind tibia and tarsus nearly uniform pale ferruginous. 
A. mutica sp. nov- 
