Disciiisi'us. — srsTCECiius. 275 



shanks ; feet piceous ; wings colourless, dark brown at the base 

 and slightly so along the fore borders ; the border of this brown 

 is very obhque, and it slants towards tlie hinder base of the 

 wing; its outskirts are confined to the sides of the cross-veins; 

 Ming-ribs and veins piceous ; poisers tawny. 



" Length of the body 3 lines, of the wing^ 7 lines. East Indies." 



T>ipe in the British 3[nseum. 



Genus SYSTCECHUS, Lw. 



Srjstachus, Loew, Neue Beitr. iii, p. M (18oo). 



Genotype, Bomhyllus sulphureus, Mikan (Europe) ; by Coquil- 

 lett's designation (1910). 



This genus differs from Bomhylias chiefly by the tw^o basal cells 

 being practically equal in length, owing to the position of the 

 anterior cross-vein near the base of the discal cell. Eyes in d" 

 sometimes separated by a narrow frons. Tip of 3rd antenna I 

 joint without the small obvious style present in Bomht/lms. 

 Pubescence of abdomen said to be longer and more ragged' than 

 in Bomh)/lius* 



Kange. World-wide. 



Fig. 16. — Sjjstoechu^, Lw., wing. 



Life-Jtistori/. The early stages of S. autmnnalls and S. oreas, a 

 European and North American species respectively, have been 

 observed by Portchinsky and by liiley. The larvas live in the 

 egg-cases of locusts ; they are whitish, cylindrical, amphipneustic, 

 and 13-segmented, much as in Bomhyllus. The pupae also 

 resemble those of that genus. 



Tahle of Species. 



1. Legs with at least femora black ; abdomi- 

 nal spines black '2. 



Legs wholly or principally yellow .'3. 



'2. Pubescence pale to bright yellow socius, Walk., p. 27(1 



Pubescence nearly white nivalis, Brim., p. 277. 



.J. First and 2nd antennal joints brownish 

 yellow; femora and tibi;e wliolly bright 

 brownish yellon ; abdominal spines [p. 277. 



yellow Jlavospiiiosas, sp. n., 



Anteniue all black ; femora brownisii . . . . eitpoffonalus, Big., p. 27H. 



* This is so in many species ; I cannot vouch personally lor the constancy 

 of the character. 



t2 



