new Tropical and Southern Opiliones. 443 



Acumontia Majori, Pocock. 



Acumotitia Majori, Pocock, P. Z. S. 1902, ii. p. 407, text-fig. 83, A-A^ 

 (the specimen questionably described as a female). 



Two specimens — a male and a female — were originally 

 described under this name, but the example described as the 

 male is the female, and vice versa. Moreover, the evidence 

 supplied by other species does not justify the opinion that the 

 very considerable structural differences between these two are 

 merely attributable to sex. External sexual characters in the 

 genus Acumontia and other genera of Trisenonychidai are 

 usually slight as compared with what obtains in some of the 

 Mecostethous Opiliones. Hence I feel compelled to regard 

 the two specimens in question as representatives of distinct 

 species. 



The type of A. Mojori is the specimen described on p. 409 

 as questionably a female, and figured on p. " 



Acumontia Roherti, sp. n. 

 Acumontia Majori, Poc, P. Z. S. 1902, ii. p. 407 {S ?)• 

 To diagnose this species it will be only necessary to con- 

 trast it with A. Majori. 



a. Scute armed in front near tlie base of tbe ocular emi- 



nence with a single small spiniform tubercle, the 

 lateral tubercles absent or small ; dorsal spines on 

 scute shorter, basal distance between those of the 

 median pair greater than the length of the spine, 

 apical distance between those of the posterior pair 

 not less than the length of the spine ; trochanter of 

 palp unspined above ; femur with three strong upper 

 spines, live or six inferior spines, and one long in- 

 ternal spine remote from the distal end ; distal spine 

 on inner edge of tibia much shorter than the median, 

 the latter close to the distal, remote from the proxi- 

 mal spine ; proximal spine on inner surface of tarsus 

 recurved (S) Majori, Poc, 



b. Scute armed in front with two spiniform tubercles, 



the upper (inner) of which is remote from the ocular 

 eminence ; dorsal spines on scute longer, the basal 

 width between the medians less than their height, 

 apical distance between the posteriors only about 

 half their length ; trochanter of palp with two spines 

 above, the outer small ; femur with five spines 

 above, four iu a series, the fifth isolated and more 

 internal ; the longish spine on the inner surface of 



* In this figure the two inferior tubercles near the anterior border of 

 the head-ehield are much too large. 



