l6 Studies on Arthropodu. I. 



Femur distinctly longer than the tibia. Foot a little shorter 

 than tibia, almost ten times as long as deep (fig. 3 e) ; second 

 joint of metatarsus slightly longer than the four following 

 joints combined; terminal joint conspicuously more than half 

 as long as the whole metatarsus. 



Fourth legs considerably shorter than the body; femur 

 about twice as long as deep (fig. 3 g). 



Three posterior abdominal segments (fig. 3 k) much more 

 slender than in the male. 



Flagellum (fig. 3k) a little or considerably shorter than 

 in the male, nearly four times as long as deep, three- jointed, 

 but the first articulation is more or less obsolete; the terminal 

 joint a little more than two-thirds of the whole length. 



The largest female which has been taken as type, has the 

 body 3.3 mm. long, the palp is 1.63 mm., first leg 3.4 mm., 

 fourth leg 2.8 mm. Other females, which seem to be 

 adult, are only about as long as the male, but the relative 

 length between body, first leg, etc. about as in the large 

 female. 



Colour and other characters not mentioned in this descrip- 

 tion nearly as in the male. 



Remarks. As usual the palps and the nagellum in both 

 sexes afford the best characters. T. parvus is easily distingui- 

 shed from T. africanus H. J. H. (1905) in having the last tar- 

 sal joint of first legs considerably shorter in proportion to more 

 proximal joints, in the shape of the femur of the palps, etc. 

 The differences between T. parvus and the next species are 

 pointed out below. 



Occurrence. -- Ten specimens, among them two adult 

 males, were collected on the Island of St. Thome at Vista 

 Alegre, altitude 200 300 m., October 9, 1900. An immature 

 female was secured at Punta Frailes, Isl. of Fernando Poo, 

 Oct. 1901. 



