0)1 new Species of Arachnida from Rodriguez. 439 



dense, somewhat variegated tomentum. The metasternum 

 bears very coarse punctures, which on the middle are rugose ; 

 the legs are reddish, and not very distinctly variegate. 



A single individual, sent by Captain Broun, with the number 

 120 attached. 



The species is allied to A. Brouni and A. buUatus, but is 

 larger than either of those species ; the uneven elytra and 

 coarsely punctured sternum distinguish it from the former 

 species ; from A. buUatics, to which it is probably more closely 

 allied, the much larger size and the light-coloured tomentum 

 on the elytral elevations readily distinguish it. 



LI. — Preliminary Notice of neio Species of Arachnida and 

 Myriopoda from Rodriguez^ collected by Messrs. George 

 Gulliver and H. H. Slater. By Arthur G. Butler, 

 F.L.S., F.Z.S., &c. 



As some time will elapse before the detailed account of the 

 collections made by the Naturalists accompanying the Transit- 

 of- Venus expeditions will be published by the Royal Society, 

 diagnoses of the new species of Arachnida and Myriopoda 

 are submitted in this paper. 



ARACHNIDA. 



Genus Sphasus. 

 Sphasus? extensip>es, n. sp. 



? . Cephalothorax testaceous, irregularly pentagonal, al- 

 most flat ; a longitudinal ridge from behind the eyes to be- 

 yond the caput : eyes black, placed upon a whitish elevation 

 on the fi'ont of the caput ; the anterior pair very minute, in 

 the centre of the face, the others considerably larger and form- 

 ing a transversely hexagonal figure: front margin of face pro- 

 jecting in the centre, behind the projection a V-shaped depres- 

 sion : abdomen testaceous, subcylindrical, flattened below, 

 tapering slightly towards the posterior extremity : legs pale 

 ochraceous ; the tibiffi and metatarsi of the two anterior pairs 

 fringed with brown bristles ; front pair very like those of 

 Miagrammopes ; palpi short, pale ochraceous, with blackish 

 tips ; maxilla3 and falces pale brown ; pectoral plate elongate 

 hexagonal ; ventral surface of abdomen with three central 

 longitudinal grey lines. Length 7 millims. ; relative length 

 of legs 1, 4, 2, 3. 

 (Coll. by Gulliver.) 



