468 



D. crocota (rubicunda Bt,ackw.). — The only specimen of this 

 species that I have seen, an adult 6, is very much injured: of the 

 spine-armature of the legs I cannot say anything with certainty : 

 the thighs seem however to have been destitute of spines (?). The 

 cephalothorax is broad in front, as in D. maurusia; the breadth of 

 the clypeus is equal to the length of the tibia of the 4:th pair. The 

 mandibles are longer than in I), maurusia, longer than the breadth 

 of the clypeus (in D. maurusia the mandibles are not so long as 

 the clypeus is broad). The distance between the two anterior centre 

 eyes is fully as long as the diameter of these eyes. The bulbus is 

 very like that of D. maurusia; it is rather suddenly narrowed on 

 the anterior and exterior sides, a little below the middle: its basal 

 half is almost oval, and has at the inner side of the apex (just above 

 the commencement of the "shaft") a little protuberance. The superior 

 part or basis of the shaft is very broad and strong, not longer than 

 it is broad, and divides into two branches which are double as nar- 

 row as the basis: one of these branches is longer, of about uniform 

 breadth, directed inwards and backwards, and forms an obtuse angle 

 with the basis of the shaft; the other is short, pointing in the oppo- 

 site direction, rounded on the under side, or even curved a little 

 upwards: these two "branches are separated by a very distinct notch 

 below. I have not been able to see any spines at the apex of the 

 longer branch in this species, as in D. maurusia. 



D. rubicunda C. Koch. — The breadth of the clypeus is con- 

 siderably less than the length of the tibia of the first pair ; the interval 

 between the two anterior eyes does not exceed half the diameter of 

 those eyes. Besides upon the posterior tibiae and metatarsi, the legs 

 are armed with several spines (which vary pretty largely in num- 

 ber) on all the thighs; the posterior thighs have the spines on the 

 upper part, the anterior thighs on the fore side, towards the apex; 

 the thighs of the l:st pair are on the inner side towards the apex, 

 where the spines are situated, somewhat thickened. (The vulva in 

 my specimen is indistinct). The bulbus is smooth and shining, and 

 has on the whole the same form as in D. Cambridgii, but it has no 

 tooth on the side, and is considerably shorter than in that species: 

 the shaft (end) is scarcely longer than it is broad. In the middle of 

 the obliquely rounded apex the bulbus carries a strong, crooked and 

 at the thin end truncated spine, which is longer than the apex of the 

 bulbus is broad, and, a little in front of this, on the inner (fore) 

 side, just at the base of the short shaft, it has a somewhat longer, 

 pointed spine curved towards the former spine. 



