421 



Genus UK.NDJtOKAKA M cHcllil 1'. 



/). Dwiisl rusti Mel. 



I have examined twenty males and eii>hteen females ; in all 

 the former the antennae are typical of D. moiislrom, while in 

 the latter thev are typical of D. iorra. Tt is possihh' that 

 Melichar described forva from a female and not a male, and 

 that they are the sexnal forms of the same species. 



Genns Platocera Mnir. 



The distinction between Platocera and Heronax is likely to 

 break down with the increase of specific forms, the antennae 

 are not o'ood generic characters. 



P. rul)icundum sp. nov. 



$ Face in profile not ascenclingly produced as in the type of tlie 

 genus; antennae as long as the face, second joint flattened, attached to 

 first joint by the basal corner, arista at apex. 



Brown tinged with red, or claret brown ; rostrum, vertex and base 

 of face and legs yellowish, abdominal sternites deeper red. Tegmina 

 fuscous, a clear hyaline half circle on hind margin beyond clavus, 

 another clear space on margin over median area, over costal cell and 

 apical subcostal and radial cells, veins tinged with red. 



Pregenital plate large, flattened, shield-shape, posterior margin angu- 

 larly produced from sides to middle, the produced portion turned ven- 

 trad, apex with small angular emargination ; anal segment fairly large, 

 apex with rounded emargination in middle half; styles fairly well de- 

 veloped. 



Length 4.3,3 mm. ; tegmen 10 mm. 



Ilab. Bartica, Briti.sh Gniana, July, lUUl {Coll. II. S. 

 Parish). Type in coll. Prof. H. Osborn. 



Genns Xicerta AYalker. 



N. rrucnla Mnir. 



Philippine Islands; Lnzon, Mt. Maqniling, Bagnio; ]\Iin- 

 danao, Davao. 



This S2:»ecies was described from one female specimen from 

 Amboina. I have five females and two male specimens from 

 the Philippine Islands which I cannot separate from the 



