80 Mr. F. O. P. Cambridge on Ctenifonn Spidera 



to tlie Sitio Andirobal. These huge spiders are evidently 

 nocturnal in their habits, the last-mentioned specimen having 

 been disturbed from its hiding-place. 



Clenus holiviensisy sp. n., (j* 2 . 



Hah. Bolivia. 



Types in coll. Brit. Mus. Nat. Hist. London, 189t). 



cJ. Total length, including mandibles, 34 mm,, $ 40 ram. 



(S . — Colour. Carapace, legs, and sternum very dark red- 

 brown mahogany, clothed with dull yellow-brown pubes- 

 cence. Abdomen brown, clothed with yellow-brown pubes- 

 cence. Legs clothed beneath with thick yellowish hair, 



$. — Colour similar to that of the male, but darker. Ab- 

 domen with broad central scalloped pale band and two or 

 three oblique lateral bands oP pale spots extending down the 

 sides, while the integuments have been denuded of pubescence. 

 Pedipalps witliout pale lines in front. Mandibles clothed at 

 apex with dull orange hairs. 



J* . — Structure. Carapace, profile almost straight. Eye- 

 formula similar to that of Beidyi and Andrewni. Lateral 

 eyes on a distinct tubercle ; second row straight by anterior 

 margins. Ocular quadrangle slightly longer than broad, 

 scarcely narrowed in front. Armature of legs similar in both 

 sexes to that of Beidyi. Lower margin of fang-groove with 

 5 teeth, upper with 3. Tarsal claws 2, with 4 curved denticules. 

 Claw-tuft present. Scopula thick on protarsi and tarsi i. and 

 ii,, slighter on protarsus iii., and absent on that of iv. Tibia 

 of pedipalp iurnished with a very thick scopula, and its apex 

 on outer side armed with a very stout, curved, chisel-headed 

 spur. For palj)al organs see IM. 111. tig. iii. a, b, c. 



2 . — Structure similar to that of the male. The vulva was 

 so damaged that no satisfactory figure can be made of it. It 

 is, however, similar in general character to those of Keyser- 

 lingii and nigriventer. 



Measurements in inilliin. — Tot. len. 41, carap. 1G"75 ; legs i. 

 65, ii. ?, iii. ?, iv. 64. 



These, the largest species of the genus I have met with 

 (excej)t Reidyi), were taken by llerr Kolle at Madre de Dios 

 (Bolivia), and were in the collection of the British Museum. 

 They are allied to Jieidi/i, but have not the pale lines on the 

 palps ($), nor is the hair on the mandible of so bright an 

 orange. 



Ctevus Perfi/i, nom, no v. {C. rujibarbis (Perty), Keys.). 

 This species, of which I liave not seen the type, appears to 



