STREPSIPTERA 667 



STREPSIPTERA. 



By R. C. L. Perkins. 







(i) Elcnchits niclanias, sp. nov. 



Thorax dull brown or pitchy, head black or nearly so, abdomen black, tips of the 

 joints of anterior tarsi pallid. Lateral branch of antennae extending nearly to their 

 tip, second joint subglobose or subquadrate in different aspects, paler generally than 

 the following. Wings very dark smoky black, apical dilatation of elytra deep black. 

 Abdominal segments with interrupted white apical margins. Genital segment more or 

 less pale within, rather broad where the sides are well angulated in front of the middle, 

 chitinous recurved hook dilated apically and terminated in a very minute pale upturned 

 spine. Expanse 33 mm. ; length \-^ mm. Male. 



Elenchiis niclanias van sihcstris van nov. 



Very like the above, but with the wings less deeply smoke-coloured, and the 

 genital segment more elongate in proportion to its width. This variety also appears 

 to be slightly smaller than the type. 



Hab. Oahu, Hawaii, and females on all the other islands. The typical form 

 described has been taken in more open country and the van silvcsfris in very dense, 

 wet forests. It infests Delphacid leaf-hoppers of many species and of different genera. 

 The var. silvesti-is approaches most nearly to E. tctmicornis, but the difference between 

 Hawaiian specimens and the examples I refer to the latter from Europe, America, Fiji 

 and Australia is much greater than any distinction between the individuals of E. teuui- 

 cornis from the above named, widely separated regions. 



