312 Mr. C. 0. Waterhonse on the genus Poly denes. 



when retracted ; the prosternum is elongate-ovate, with a 

 mesial impressed line. 

 Length 3'5 mm. 



The specimen from which this descrijition is taken was 

 found by mj colleague, Mr. Oldfield Thomas, on a bat 

 {Megaderma hjra) received from Secunderabad, in the 

 Madras Presidency. 



Since the above descriptions were written, my colleague, 

 Mr. Oldfield Thomas has found at the back of the head of 

 a bat {Megaderyna spasma), from Java, two specimens of 

 a new Polyctenes. I propose to call it 



Polyctenes spasmco. 



This species is closely allied to P. molossus, Giglioli, 

 from China. The head is Avidest at the posterior angles, 

 gradually narrowed anteriorly. The antennjB are rela- 

 tively shorter, not extending to the back of the head. 

 The thorax is rather angular at the sides, a little before 

 the middle ; the disk has a slight oblique ridge on each 

 side ; the base has no fringe of cultriform spines, but has 

 only fine hairs. The dorsal plates of the mesothorax are 

 rounded at the sides and ]:)Osteriorly, Avith the mesial 

 longitudinal line dividing them moderately deeply im- 

 pressed. The metathorax has also a longitudinal im- 

 pressed line. The legs resemble those of P. lyrce, the 

 intermediate and posterior tarsi being three-jointed as in 

 that species ; the claws are formed in the same manner. 

 Tlie prosternum is truncate in front, parallel at the sides, 

 obliquely narrov/ed between the anterior legs. The 

 meso- and meta- sterna are nearly as in P. lyra. 



