JJlTTOi'TERXIS. 139 



Genus DITTOPTERNIS. 



Dit/dptenii,-!, Saussiire, Mum. Sdc. (ifiir've, xxviii (9), 1884, pp. 52, 

 125; XXX (I), 1888, ])p. 19,44. 



'J'ype, Dittopiernis cej/lonica. Sauss. 



Range. India. Ceylon. Australia, 8. Africa. 



Head broad, grainilated ; scutelluiu of the vertex 5-sided, 

 longer than broad, truncated in front, and the lateral carinae 

 not extending behind the eyes ; frontal ridge broadly sulcated, 

 parallel-sided, continuous ; antenna^ longer Ihau the head and 

 pronotum. Prouotum granulose, the median carina- bitiiber- 

 cnlate in front, and deeply cut by the principal sulcus before 

 the middle ; the front border truncated, behind this somewhat 

 constricted to the principal sulcus ; hind border rectangular, 

 with the tip rounded off ; deflexed lobes nearly square, with 

 the borders slightly sinuated. Tegniiua long, narrow, densely 

 reticulate, and opaque to beyond the middle, then membranous 

 and subhyaline, with complete intercalated nervm'es. Wings 

 hyaline, with the base coloin-ed, and a curved black band beyond. 

 Hind femora denticulated, hind tibia? with nine or ten spines. 



• Kcij to ilic Species. 



1 (2) Head and pronotum slightly aramilar. . cci/Ziwica, Sauss., p. 139. 



2 (1) Head and prnnotum Rtroiioiy granular. 



3 (4) Lateral lobes of pronotum rectangular 



behind roiusfa, Walk., p. 140. 



4 (3) Lateral lohes of ])rnnotiim ()l)lique and 



rounded behind zehrata, 8au!-s., p. ]40. 



100. Dittopternis ceylonica. Sanss. 



Dittopternis ceylonicn. Sanssure, Mem. Soc. Geneve, xxviii (9), 

 1884, pp. 125, 12(j ; XXX (1), 1888, pp. 19, 44. 



Keddish grey, marbled with brown. Head rather smooth, 

 vertex between the eyes very slightly carinulated, with a few 

 granules on the occiput; frontal ridge sulcated, much narrowed 

 between the antennse, and truncated above. Pronotum with the 

 principal sulcus slightly before the middle, somewhat constricted 

 before the sulcus, granulated in front, the carina raised, and 

 well marked, the hind border forming less than a right angle, 

 and rounded at the tip ; deflexed lobes rectangular behind. 

 Teginina long, brown or ferruginous, the basal half with two 

 chestnut bands, then narrowly dotted A\ith grej", the hinder 

 portion concolorous ; the discoidal area beyond the middle sub- 

 hyaline, with ferruginous nervures. AVings hyaline, base bright 

 yellow, followed by a more or less extensive brown band ; 

 nervures of the costa brown ; the rest hyaline, more or less 

 clouded before the tip. Hind femora yellowish with three brown 



