I9I5.] A. ROHWER: Oriental Sawfites. 51 
Genus Canonias, Konow. 
Canonias assamensis, sp. n. 
This species differs in minor colour characters from inopinus, 
Konow. 
Female.—Length 8 mm. Anterior margin of the clypeus 
slightly arcuately emarginate, the angles sharp; supraclypeal area 
flat ; supraclypeal foveae elongate, deep; antennal foveae obsolete, 
middle fovea quadrate in outline, open above; pentagonal area 
well defined, from its broadest portion there is a transverse carina 
which touches the inner margin of the eye; postocellar area de- 
pressed, sharply defined laterally by deep foveae, not defined 
anteriorly, about four times as wide as the cephal-caudad length ; 
postocellar line about one-fourth longer than the ocellocular line; 
antennae long and slender, tapering apically; third joint distinctly 
shorter than the fourth; head and thorax shining, impunctate; 
stigma broadest at middle, tapering each way; transverse radius 
strongly oblique joining the radius slightly before the apical third; 
second cubital cell longer on both radius and cubitus than cubital 
third. Black; scape, pedicellum, sixth, seventh and eighth anten- 
nal joints, tergite, posterior margin of the angles of the pronotum, 
tegulae, perapteron, palpi, anterioi legs, intermediate legs (except 
a fuscous band on the tibiae and the basitarsus), the posterior 
legs (except the tibiae and basitarsus) white or yellowish white ; 
venter and the sides of the tergites and the apical two tergites 
fulvous; wings hyaline, iridescent; venation dark brown; head 
and thorax without pubescence. 
Margherita, Assam. Described from three females (one 
type). 
Type and paratype in Indian Museum; type No. *s°, para- 
type No 73+. 
Paratype in U.S.N.M. 
Genus Beleses, Cameron. 
Beleses nigriceps, sp. n. 
This species is readily separated from the other species of this 
genus by the black head. As far as the males and females have 
been associated it is the only species in which colour antigeny occurs. 
Except for the colour of the legs and having only one discal cell in the 
hind wings the female agrees with Cameron’s Sunoxa purpureifrons. 
Female.—Length 6mm. Anterior margins with the clypeus 
truncate, surface coarsely irregularly punctured ; supraclypeal area 
flat, narrow; supraclypeal foveae deep, confluent with the anten- 
nal foveae; middle fovea represented by the shallow transverse 
impression ; front and posterior orbits shining, impunctate; post- 
ocellar area sharply defined laterally but not defined anteriorly ; 
postocellar line subequal with the ocellocular; flagellum gradually 
thickened until it reaches the apex of the second joint; the second 
joint one-fourth longer than the third; the fourth and following 
