74 PROCEEDINGS OF THE ACADEMY OF [Feb., 



The present species clearly belongs to the group which includes 

 A. australis Saussure. This is shown by the robust form and ce- 

 phalic femora having a dorsal expansion, weak but distinct in the 

 males, conspicuous in the females. 



The male before us is apparently an example of recessive colora- 

 tion. The general coloration is yellowish, the cephalic femora 

 weakly suffused with pale brown meso-distad on their external faces, 

 the other femora suffused proximad and distad with pale brown. 

 The tegmina have the discoidal fields transparent, hyaline, immacu- 

 late, with veins yellowish. 



The female at hand is similar except that the general coloration 

 is light brown, the cephalic femora dorsad suffused with slightly 

 darker brown proximad, mesad and distad on their external faces. 

 The tegmina have the discoidal fields transparent but heavily and 

 evenly reticulate with innumerable pale brown veins, so that these 

 areas appear only slightly vitreous, with third and fifth obliciue 

 veins showing a small but distinct maculation of dark brown about 

 their bases. 



Length of body, cf 25, 9 33; length of pronotum, cf 8, 9 9; 

 greatest pronotal width, cf 2.5, 9 3.6; length of tegmen, cf 18.8, 

 9 21.9; width of tegminal marginal field, cf 1.3, 9 2.4; width of 

 cephalic femur, cf 2, 9 3 mm. 



Acromantis australis Saussure. 



1871. Acromantis australis Saussure, Melang. Orth., I, p. 449, pi. VII, 

 fig. 68. [ 9 : Moluccas; Island of Waigiou.] 



Fakfak, Dutch New Guinea, 19. 



This is the only species of the genus before us which has a well 

 developed conical projection above the ocelli; this projection slightly 

 higher but more slender than that at the dorsal apex of the facial 

 scutellum in the female sex. The present specimen has the free 

 margin of the axillary field of the wings tinged with dark brown, 

 as described for Bornean material of A. aruana Westwood, a name 

 which has been assigned to synonymy under australis. 



Length of body 32, length of pronotum 9.3, greatest pronotal 

 width 3.8, length of tegmen 22.8, width of tegmen 7, width of teg- 

 men at apex 4.8, width of tegminal marginal field 2.3, width of 

 cephalic femur 2.9, height of lamella on caudal femur .9 mm. 



Acromantis dyaka new species. (Plate II, figure 5.) 



This species is the heaviest of the genus, showing the maximum 

 development of pronotal marginal denticulation and femoral lamel- 



