XV, 1 
Baker: The Malayan Machxrotinse 
69 
entirely referable to the frons. For purposes of description in 
this paper, however, the entire superior surface of the head 
between the eyes is termed vertex. 
Subfamily MACH^ROTIN^l sensu strieto 
Key to the tribes. 
a 1 . Body slender; scutellum arched and with a distinct dorsal furrow; 
pronotum without produced lateral angles. 
b 1 . Frons not produced above; hind tibiae without a tooth-... Machssrotini. 
b 2 . Frons acutely produced above; hind tibiae with one tooth-Sigmasomini. 
a 5 . Body very thick and stout; scutellum nearly flat and with dorsal furrow 
subobsolete; pronotum with lateral angles produced into high thin 
laminae Maxudeini. 
Tribe MACH^ROTINI 
This tribe includes but one Malayan genus, so far as known. 
Genus MACHZEEOTA Burmeister 
Key to the species. 
a 1 . Claval vein apically forked. 
b 1 . Body of scutellum not high arched posteriorly, its greatest depth much 
less than length; vertex anteriorly broadly rounded; spatulate scu- 
tellar furrow about half length of body of scutellum (Plate I, figs. 
1 and 9) M. notoceras Schmidt. 
b 2 . Body of scutellum high arched posteriorly, its greatest depth as seen 
from side about equaling length; vertex anteriorly subangulate; 
spatulate scutellar furrow much more than half length of body of 
scutellum (Plate I, figs. 2, 3, and 10; Plate II, fig. 1). 
M. philippinensis sp. nov. 
a ! . Claval vein simple. 
b 1 . Median cell short and broad; length of vertex far less than width 
between eyes posteriorly; spatulate scutellar furrow less than half 
length of body of scutellum. 
c 1 . Length of body of scutellum distinctly greater than that of pronotum ; 
length of scutellar spine less than once and a half the length of 
body of scutellum; ocelli nearer to median line than to eyes (Plate 
I, figs. 4, 5, 11, and 14; Plate II, figs. 3 and 4).. M. ensifera Burm. 
c 2 . Length of body of scutellum subequal to that of pronotum; length 
of scutellar spine a little less than twice length of body of scu- 
tellum; ocelli as near median line as to eyes (Plate I, figs. 6 and 
12; Plate II, figs. 5, 6, and 13) M. Iuzonensis Schmidt. 
b 2 . Median cell long and narrow; length of vertex subequal to width 
between eyes posteriorly; spatulate scutellar furrow much more 
than half length of body of scutellum (Plate I, figs. 7, 8, and 13; 
Plate II, figs. 2, 7, and 10) M. fusca sp. nov. 
In Machxrota notoceras, M. philippinensis, and M. ensifera 
the sharp upper border of the scutellar spine is extended into 
the scutellar furrow as a sharp median carina to half its length, 
whereas in M. Iuzonensis and fusca, it scarcely enters this 
