IPHIA ULAX AND CHA OLTA . 2 5 



the stigma, the hind wings with a fuscous cloud at the apex ; 

 the 3rd. abscissa of radius almost equal in length to the 2nd.; 

 the 1st transverse cubital nervure and recurrent straight, 

 oblique, interstitial ; the basal two segments of abdomen 

 striated in part. 9 . 



Length 12 ; terebra 6 mm. 



Bab. Matang. 



Face covered with long blackish hair; front deeply fur- 

 rowed in the middle; temples roundly narrowed; occiput trans- 

 verse. Scape and pedicle of antennae rufous, the rest black. 

 Thorax smooth and shining ; the middle lobe of mesonotum 

 raised in front. Fore tibiae slightly shorter than the basal 3 joints 

 of tarsi united. Wings long, large; yellowish-hyaline; the 

 mark at base of stigma is square, does not project beyond the 

 transverse basal or cubitus ; the 2nd. abscissa of radius equal in 

 length to the 3rd.; the recurrent nervure is interstitial. Abdomen 

 as long as the head and thorax united. First segment of abdomen 

 broad, shorter than the second segment ; the central part round- 

 ly raised ; irregularly longitudinally striated ; a stout keel 

 thickened at the base and furrowed laterally, down its centre ; 

 the 2nd. stoutly striated to near the apex ; the central plate, 

 broader than long, narrowed to a point, smooth and shining ; 

 its keel extending to the smooth apical border ; on either side 

 is a somewhat similar smooth, broader than long, triangular 

 plate ; the suturiform articulation closely striated ; the other 

 furrows, smooth ; there is a striated transverse furrow before 

 the apex of the 2nd. segment ; the abdomen is as long as the head 

 and thorax united and broader than the latter. 



This species may be known from /. leptopterus by the basal 

 abdominal segments being striated, by the shorter and broader 

 abdomen and by the stigmal mark not extending beyond the 

 cubitus. 



b. Luteous, the wings large, yellowish-hyaline, without a black 

 mark at the base of stigma ; the hind femora black. 



Iphiaulax minos sp. nov. 



Luteous, the flagellum of antennae and hind femora black ; 

 the apex of hind tibiae blackish ; wings longer than the body, 



R. A. Soc, No. 42, 1904, 



