some Oriental Nyctciibiidaj. 231 



segments wliich are bare in the specimens of parilis before 

 me. But these differences are no greater than some which 

 have been found to be due to individual variation in certain 

 other species. 



I liave endeavoured without success to obtain the hjan of 

 specimens of stylidiopsis for comparison \\'\i\i parilis, a com- 

 parison which alone could settle the question of their possible 

 identity. I must therefore Ijc content to insert below the 

 name, and a reference to the description of, stylidiupsis as a 

 possible synonym of parilis. 



At all events, it is now possible to give a full description 

 and figures of both sexes of Nycteribia parilis. Walker. 

 Tiiey are made from the spirit-specimens collected by Muir 

 in Amboyna, in which the characters can be clearly made 

 out, and which correspond closely with Walker's type. 



Nycteribia {List ropodia) parilis, Walker. 

 (PI. XII. tigs. 20-23.) 



Nycteribia parilis, Walker, Journ. Linn. Soc. London, Zool. v. 1861, 

 p. 300; Speiser, Arch. Naturg. Ixvii. 1. 1901, p. 52. 



? Nycteribia {Listropodia) sti/lidiopsii, Speiser, c? J , in Voeltzkow, 

 lieise in Ost-Afrika, ii. 1908, p. 200. 



Nycteribia (Listropodia) tolisima, Speiser, MS. 



? Lipojytena tolisina, Muir, Bull. Mus. Zool. Harvard, liv. 1912, pp. 351- 

 300, pi. ii. (larva). 



N. parilis is a minute pale-coloured Nycteribia, belonging 

 to the subgenus Listropodia, that is, having the tibire broad 

 and flattened. Its most remarkable feature lies in the form 

 of the 'J abdomen, in which a greater number of segments 

 are distinguishable than is the case in the ? ? of many 

 Nycteribiidae. A glance at ]^^. 22 will show that 4 seg- 

 ments are distinguishable dorsally in addition to the anal 

 segment, the dorsal chitinous portion of which is sym- 

 metrically divided in a remarkable manner. 



Lenyth of the body l'25-l 5 mm. 



Colour pale, yellowish. Head bare, with only two bristles 

 on the front margin of the vertex and a very few more on 

 the margins of the cheeks. Femora Mith their anterior 

 surfaces bearing short bristles in the front pair, nearly bare 

 in the middle and hind pairs ; posterior surfaces bare of 

 bristles except in the lower portion towards the base ; lower 

 edges bearing some short bristles, and a very long erect one 

 directed forwards, situated at about f the length from the 

 base ; upper edges bare except for a few short bristles near 

 the apex, and two short erect ones situated respectively at 

 about i the length from the apex and immediately on the 



