Mr. A. S. Hirst on new P ill-Mill ipndes. 215 



liair of the Swiss form is sliorter and greyer than that of 

 iV. anomalus. The braiii-case of the skull in the former species 

 is rounded and somewhat globular, while in the Spanish 

 animal it is flat in the anterior part and about the occiput, the 

 entire outline being not evenly convex, but nearly angular. 



Owing to the absence of hair-fringe on the under surface of 

 the tail, N. anomalus has hitherto been confounded by Spanish 

 naturalists with Sm-ex araneus, a species that I have never 

 seen in the Peninsula. Under that name the specimens in 

 the Madrid Museum were exhibited. 



XXXIII. — On Four neto Fill-Millipedes from the Malay 

 Feninsula and Siani. J3y A. S. HiKST (British Museum, 



Nat. Hist.). 



[Plate X.] 



The four forms which I describe below as new seem to be 

 somewhat closely allied to one another. Their copulatory 

 feet present much resemblance and the walking-legs in all 

 four species are furnished with three spines above the claw. 

 Three of them come from the Malay Peninsula, and tlie 

 remaining one from Siam. Z. anthracina, Pocock, from the 

 Malay Peninsula, Z. impunctata, Pocock, from Penang, and 

 Z. semilievisj Pocock, from South Tenasserim, are also 

 members of this species-group. The legs of these last species 

 were described by Mr. Pocock * as being provided with two 

 spines above the claw ; in reality, however, they are provided 

 with three. 



Zephronia rugulosa, sp. n. 



Colour (faded, in spirit). Head, nuchal plate, and the first 

 tergite dark brown or black : tergites dark brown, the ante- 

 rior borders yellowish brown and ornamented with several 

 small dark spots t; the last tergite with irregular dark spots. 



Head. Anterior region of tlie head marked with tairly 

 numerous punctures, the posterior part sparsely punctured. 

 The anterior border with a single tooth. 



Nuc/ial plate with sparse and fine punctures. 



First tergite convex anteriorly, the usual angle being almost 



♦ Ann. Mus. Civ. Genovn, ser. 2, vol. x. no. 30, p.. 5 (I8'J0) : Ami. \- 

 Mag. Nat. Hist. ser. 6, vol. xvi. p. 413 (18'Jo). 

 t These spots are probably due to bad preservation. 



