DICHOPTERA. 239 



a'. Vertex of head ceatrally lohately produced, its anterior angles 

 suhquadrangulate. 



b'. Front of head strongly almost j^ei'^^endieidarly produced, 

 its aj^ex obtuseh/ angidate. 



1770. Dichoptera hampsoni, Bist. Tr. E. S. 1892, p. 278. 

 Dicboptera hvaliuata, var. hanipsoui, Melich. Horn. Faun. Ceylon, 



p. 19, t. i, f. 1 (1903). 



Body and legs dull ochraceous ; edges and ridges of head and 

 pronotum and longitudinal lines to vertex of head black ; pro- 

 notum sometimes with strong discal black saffasions, in other 

 specimens these are absent ; mesonotum with the discal area 

 strongly blackly punctate posteriorly, with two large pale spots 

 with black centres, some large black spots on its lateral areas aud 

 small ones on its anterior margin ; abdomen above with a double 

 series of large segmental black spots ; head beneath with I'idges 

 and edges and a central line to face and clypeus black ; anterior 

 and intermediate tibiae with three black annulations; tegmina 

 hyaline, the venation fuscous irroratetl with ochraceous, transverse 

 fascia at end of ulnar areas less defined than in D. hyalinata, but 

 with numerous fuscous mottlings on apical third, and with a basal 

 and two discal spots on basal two-thirds, and distinct fuscous 

 spots on costal area ; wings hyaline, their apical margins fuscous. 



Length excl. tegm. 20 ; exp. tegm. 53 millim. 



Hah. Xilgiri Hills, ISouthern Slopes (Hampson). Ceylon ; 

 Kandy (Green). 



B. Vertex of head as broad as long. 



a'. Vertex of head centrally subquadrangularly produced, its 

 anterior angles obtusely angulate, its lateral margins very 

 strongly sinuate. 



b'. Front of head moderately apivardly produced, its apex obliquely 



truncate. 



1771. Dichoptera nubila, Dist. Tr. E. S. 1892, p. 277. 



Body and legs bright brownish-ochraceous ; head with the 

 edges, ridges, a waved longitudinal spot in front of eyes, truncate 

 apex of cephalic process, two central convex longitudinal lines to 

 vertex, and a small spot near each anterior angle to same black ; 

 pronotum with the lateral edges, central ridge, and some irregular 

 discal fasciate markings black ; mesonotum with the ridges, a 

 large central somewhat hourglass-shaped fascia, and an outwardly 

 quadrangular-shaped fascia on each lateral area black ; abdomen 

 above with a double central series of large segmental spots aud a 

 broken macular lateral marginal fascia on each side black ; body 

 beneath and legs much mottled with black, and tibiae witli two broad 

 black annulations ; rostrum at apex aud also apex of penultimate 

 joint black ; tegmina obscure hyaline, venation fuscous irrorated 



