in the British Museum. 143 



Fiif. 2 e. From cast skin, right palp, x 55. s, sense-organs ; t, tactile 



hairs. 

 Fig. 2/ $ . Left coxae iii.-iv., X 30. 

 Fiy. 2y. Claw with lateral hair, x 145. 

 Fig. 2 h. Cobweb of cocoon, x 650. 



Chelifer equester, sp. n. 



Fig. 3« $. Flagellum of left antenna, x 151. 



Fig. 3 6$. Tip of immovable finger of left antenna in ventral view, x 151. 



/, lamina exterior : t, terminal spine ; s, five deutated lobes 



of the lamina interior. 

 Fig. 3 c 2 . Left galea, x 115. 

 Fig. 'ic S • Left movable finger of antenna, X 100. 

 Fig. 3 <; $ . Coxfe iii.-iv., x 34. 

 Fig. Sd ^ , Coxfe iii.-iv. with genital area, X 34. 



Plate IX. 



Chelifer equester, sp. n. 



Fiq. 1 a c? . Left palp, X 10. 

 F'iff. \a 2- Left palp, X 10. 

 Fiff. I b (^ . Femur of right palp, X 15. 

 Fig. 16$. Femm- of right palp, X 15. 

 Fi(/. 1 c c? ■ Tibia of right palp, X 1 8. 

 Ftq. Ic 2- Tibia of right palp, x 18. 

 Fig. I d (^ . Hand of right palp, x 10. 

 Fi'ff. Id 2- Hand of right palp, x 10. 

 Fig. lee?. Left leg i., x 18. 

 Fi(/. 1/ d . Left leg ii., X 18. 



Ideoroncus mexicanus, Bks., $ . 



Fig. 2 a. Front part of cephalothorax, x 91. 

 Fig. 2 6. Sen-ula interior and flagellum of left antenna, x 249. 

 Fig. 2 c. Serrula exterior and galea of left antenna, X 249. 

 Fig. 2 d. Right antenna in dorsal view, x 125. 



Plate X. 



Ideoroncus mexicanus, Bks. 



Fig. 1 a. Cephalothorax in ventral view, x 50. i, interior marginal 

 fissure ; m, median exterior lyriform organ. 



Fig. 16. Left palp, x 30. 1-8, tactile' hairs of hand and immovable 

 finger. 



Fig. 1 c. Hand of right palp, x 35. Numerals as in 1 6. 



Fig. 1 d. Left leg i., x 50. 



Fig. 1 e. Left leg iv., X 50. 



Fig. If. Inner lateral hair of left tarsus iv. 



Ideobisium Balzanii, sp. n., S • 

 Fig. 2 a c? . Antenna and eyes in dorsal view, X 130. 

 Fig. 2b 2- L<^ft immovable finger, X 216. s, serrula, seen from edge. 

 Fig. 2 c S • Cephalothorax in ventral view, x 52. 

 Fig. 2d S ' Left palp, x 37. 1-8, tactile hairs. 

 Fig. 2 e S • Eight hand, x 37. 4-8, tactile hairs. 

 Fig. 2f S- Left leg i., x 65. 



Fig. 2g S > Left leg iv., x 05. /, tarsal " tactile" hair. 

 Fig. 2 A J . Inner lateral hair of left tarsus iv. 



