1920.] F. F. LaidIvAw ; A new species of Pseudophaea. 25 



its greatest breadth, a little over 6 mm., appears to be mid-way 

 between the nodus and pterostigma. 



The wings are colourless, and the length of the pterostigma is 

 4 mm. 



Head more extensively marked with bluish-white than is that 

 of the male. The coloured area of the upper lip is broader, the 

 mark on the genae ascends to the level of the anterior ocellus, and 

 there is a bluish- white spot in the centre of the post-clypeus, 

 and a small square mark on either side of the ocelli of the same 

 colour. 



Prothorax : As in the male, but the coloured spots a trifle 

 smaller relatively than in that sex. 



Synthorax : Mesepisterna and dorsal surface black, on either 

 side of the mid-dorsal carina is a bluish- white line narrower than 

 that seen in the male, a little widened anteriorly. Just in front of 

 the humeral suture is a second line rather of a yellow hue, this 

 anteriorly almost meets the more median line. 



The mesepisternum is dull yellow, bordered with black along 

 the humeral suture, the yellow colour enclosing a large oblong- 

 oval island of black. The first and second lateral sutures are 

 marked with black along their whole length ; the rest of the side 

 and the ventral surface of the synthorax is dull yellow in colour. 



Abdomen: Shining black above and at the sides, ventrally 

 dull yellowish brown. Segments 1-4 have a very fine, 3^ellow line 

 marking the dorsal, longitudinal carina; the line is present but 

 barel}^ perceptible on segment 5, and reappears on segments 8, 9. 



Laterally segments i and 2 have a broad, pale-yellow band ; a 

 similar band occurs on segments 3-6, not quite reaching the distal 

 border of the segment, but widened at the base of each to form 

 an incomplete pale ring. On segment 7 the band is diminished, 

 extending only one-half the length of the segment, and the basal 

 widening is less marked. On segment 8 the band is reduced to a 

 small posterolateral spot, and on 9 to antero-lateral and postero- 

 lateral spots. 



Legs : Black, excepting the coxae and anterior surfaces of the 

 femora which are yellow. 



Anal appendages equal in length to segment 10, acute-conical. 



This fine new species, which I have much pleasure in dedica- 

 ting to Major F. C. Fraser, R.A.M.C, belongs to a small section of 

 the genus Pesudophaea, which may be called the section dispar, 

 after its first described species, named by Rambur. 



One other species referable to the section has been described. 

 This is Pseudophaea impar, Selys, from Malacca, with the race 

 inaequipar, Selys, described by its author as a distinct species from 

 Borneo. Kriiger has reported Pseudophaea impar from Soeka- 

 randa, Sumatra {Stett. Entomol. Zeit. 1898, p. 78), but I do not 

 know whether it differs to any extent from the Peninsular form or 

 not. 



Pseudophaea fraseri and Pseudophaea dispar are much more 

 nearly related to each other than either of them is to Pseudophaea 



