10 NOTES ON MILLIPEDE?. 



Genus Thy ropy gus. 



Ventral grooves long" and deep, distance between eyes 

 about equal to or greater than the long diameter of an eye. 



8. Thyropygus perahensis, Pocock. 



Spirostreptus perakensis, Pocock, Linn, S. J. Zool. xxiv, p f 

 322 (lead figured). [1892]. 



The type specimen, from Perak, was presented to the 

 British Museum by Mr. J. IT. Leech ; it is described as a male. 

 210 mm. in length, with 69 segments, and in colour polished 

 black, with antennae and legs reddish yellow. 



9. Thyropygus boivringii, Pocock. 



Spirostreptns bowringi, Pocock. Linn. S. J. Zool. xxiv, p. 

 321 (head tig. p. 322) [1892]. 



During the rainy season this species is very plentiful in 

 Siam, coming out usually towards evening and wandering about 

 gardens and paths, and also occasionally entering houses ; 

 during the rest of the year it seems to quite disappear, presum- 

 ably it hides away in holes. I have met it in the following 

 localities : — 



Bangkok (May, June, July and August). 

 Ayuthia (June). 

 Pachim (April). 

 Kosichang (August). 



Adults, of both sexes, have from 60 to 72 segments. The 

 longest male I measured was about 5§ inches (148 mm.), the 

 longest female about 8| inches (or 220 mm.). 



Colour (from life), drawn up from a large series of Bangkok 

 specimens. 



The whole animal is of a very rich warm yellow ochre, with 

 these exceptions : — the front surface of the head is a rich red- 

 yellowish brown, sometimes darker between the eyes, it also 

 gets darker towards the mouth shading into black on the upper 

 lip. The antennae are rich red-yellowish brown. The eyes 

 black. The first segment behind the head is rich red-yellowish 

 brown, getting darker towards its posterior edge. The remain- 

 ing segments have each on their posterior part a very dark 

 brown band, in some individuals pure glistering black, this band 

 gets narrower and lighter in colour underneath as it approaches 



