Studies on Arthropoda. I. 



cuticle of the cephalothorax and of the major part of abdomen 

 is rather hard; the front margin of the head without any strong 

 median process; the five coalesced abdominal tergites each 

 with a median spine; the femora of the palps without processes 

 and only with normal denticles below ; the legs extremely long, 

 and all denticles quite small 1 ). 



Megistobunus longipes n. sp. 



PI. Ill, figs. 3 a 3d. 



Male. 



Cephalothorax highly vaulted ; its penultimate segment mo- 

 derately, its last segment well, marked off. The front margin 

 with a few small denticles. Above the openings of the stink- 

 glands is at each side a longitudinal row of three oblong-trian- 

 gular processes, and a smaller denticle is seen near the base 

 of the ocular protuberance; between this protuberance and the 

 frontal margin several minute denticles are scattered. The 

 first thoracic segment has at the front margin a transverse row 

 of three pairs of conspicuous teeth and a couple of denticles 

 at the lateral margin; second segment has a transverse row 

 with some few denticles. 



The ocular protuberance extremely large, with three pairs 

 of conical, slender and very diverging processes (fig. 3 b) ; the 

 third pair are exceedingly long, a little longer than first pair, 

 and about twice as long as second pair. The protuberance, 



l ) When I looked over Dr. Roewer's descriptions of the genus Megabunus 

 and its three species, I found his work very far from satisfactory. In the 

 diagnosis of the genus he says: "Palpen kraftig", but in the description 

 of M. diadema: "Palpen klein und schwach", and at the two other 

 species respectively: "Palpen klein" and: "Palpen kiirz". In the diag- 

 nosis of the genus he says: "Beine lang and diinn", in the description 

 of M. diadema: "Beine nicht sehr lang; diinn", of M. rhinoceros: 

 "Beine kurz", and of M. Grouvellei: "Beine diinn, wenig lang". That 

 generic characters as those quoted on Megabunus are sheer nonsense 

 can scarcely be denied. 



