82 MR. F. F. LAIDLAW ON THE [Feb. 4, 



citron-yellow spot between the first pair of wings. "Ventral 

 surfaces and legs rich black. The legs are robust, rather short ; 

 hindermost pair of femurs with stout spines. 



Abdomen somewhat dilated at its base, then segments 3 to 6 

 long and cylindrical, segments 7 to 9 compressed laterally, 10 very 

 short. Black, with yellowish marks as follows : — on segment 2 a 

 lateral spot, the auricles, and a very small dorsal lozenge-shaped 

 mark. Segment 3 has a trace of a yellow spot on either side and 

 a very fine mid-dorsal line. The basal third of segment 7 with a 

 large dorsal mark. Anal appendages black, resembling those of 

 G. T-nigrum very closely. 



Coloiation generally remarkably similar to that of a specimen 

 marked Macrogomjihus quadratus in the British Museum. 



A single male from forests at the foot of Gunong Inas. This 

 fine species differs from other members of the genus Gomphidia 

 in having its wings of equal length with the abdomen. It 

 appears, moreover, to be the largest known member of the 

 legion Liiidenia. The internal nervule of the pterostigma can 

 hardly be said to be prolonged, but this character is scarcely of 

 suificient importance to justify the removal of this species from 

 the genus Gomphidia. The form of the anal appendages and the 

 absence of any leaf-like dilatation of the sides of segments 7 or 

 8, as well as the shape of the vertex, indicate that it must be 

 referred to this genus, of which it may form a new section. 



Legion Gomphoides. 



SiEBOLDius GRANDis Kriiger. (Plate YI. figs. 3, 3«, 4.) 



Sieholdius grandis, Kriiger, Stett. ent. Zeit. 1898, p. 311. 



I refer to Kriiger's species a fine male, which agrees in size, 



wing-characters, and coloration fairly closely with the females 



described by him from Sumatra. 



Total length 83 mm. 



Length of abdomen (without ap- 

 pendages) 59 ,, 



Length of appendages (upper pair). 2 ,, 



Fore wing, leng-th 55 ,, 



,, breadth 12 ,, 



Hind wing, length 52 ,, 



,, breadth 15 ,, 



Pterostigma 5'5 ,, 



Femur of last pair of legs 20 ,, 



Tibia „ „ 14 „ 



Breadth of head 11 ,, 



Antenodal cells of fore wing 22-23, postnodal 18-19 ; of hind 

 wing 16-17 and 17 respectively. Pterostigma lies over six cells. 

 Basal subcostal nerve present in all wings. Triangles of all four 

 wines with one cross nervure. The middle thiids of all the wines 



