On the Genus Grammostola, Simon. 293 
Figs. 5-6. Dicaiothrips rex, sp. u., d, from Silhouette. 
. Head, pronotum, and right fore-leg. x 30. 
. End of abdomen. x 30, 
. Dicaiothrips stenocephalus, Bagn., 3, from East Africa. 
. Head and pronotum. x 30. 
Fug. 
Fig. 8, Dicaiothrips hystrix, sp. u., ¢, from Silhouette. 
. Head and pronotum. x 30. 
Fig. 9. Dicaiothrips mahensis, sp. n., 3, from Mahé. 
. Head, pronotum, and right fore-coxa. x 30. 
Figs. 10-11. Gynaikothrips scotti, sp. n.. 2, from Silhouette. 
10. Head and pronotum. x 70. 
1]. End of abdomen, x 70. 
oO MD IN DAN 
XXXV.—On the Genus Grammostola, Simon. By MELLO- 
Lerrao, M.D., Fellow of the Brazilian Society of Sciences. 
THE genus Grammostola, created by E. Simon to his Zury- 
pelma pulchripes, is essentially neotropical, extending itself 
from 20° to 30° south Jatitude ; and almogt all his species 
inhabit the southern Brazilian states (S. Paulo, Paranda, Santa 
_ Catharina, Rio Grande do Sul) and neighbouring countries. 
In the collections of the Natural History Museums of 
S. Paulo and Rio de Janeiro I have seen almost all the 
known and some new species of this genus, and their study 
permits me to amend and complete Simon’s and Pocock’s 
diagnoses. 
GRAMMOSTOLA, Simon, 1892 =CrITHAROSCELUS, Pocock, 
1903. 
Cephalothoraz as wide as long or a little longer, with 
thoracic fovea deep, right transverse or a little curved. 
Eyes small; those of anterior file subequal and subequally 
spaced, in a more or less procurved file. Posterior median 
eyes generally much smaller than the anterior ones. 
The strtdulating organ consists of a thick cluster of slender 
bristles, forming a pad upon the distal third of the posterior 
side of the coxa of the palp, and a cluster of similar bristles 
above and below the suture, at the distal end of the coxa of 
the anterior leg. These bristles are more or less numerous. 
Sternum flat, with marginal posterior sigillee. 
Legs 4,1, 2, 3 or 4-1, 2, 3 or 1, 4, 2, 3. The scopula of 
the protarsus 1. and i. either covering less than half the lower 
