238 MESSRS. T. BLACKBURN AND P. CAMERON ON THE 



Wings hyaline, stigma and prostigma fuscous ; nervures 

 testaceous. Female. 

 Length 4 millim. 



Differs from S. testaceipes in being longer and stouter ; 

 in the antennae being longer, the basal joint being longer 

 and more pear-shaped, the other joints also not being so 

 thick nor so moniliform ; in the abdomen being shorter 

 and broader, it being almost shorter than the head and 

 thorax united, the segments, too, not being broadly tes- 

 taceous at their edges ; the femora are black ; the head is 

 more narrowed in front of the eyes ; the wings are longer, 

 and the nervures are darker. 



Hab. Mountains of Hawaii (no. 134). 



63. Sierola leuconeura, sp. nov. 



Black ; the knees, tibise, tarsi, and basal half of antennae 

 testaceous ; the hind tibise fuscous in the middle ; antennae 

 scarcely so long as the thorax, the basal joint shortly 

 pedunculated, double as long as wide, double the length 

 and thickness of the second, which is thinner and shorter 

 than the third, the third to sixth thicker than the follow- 

 ing, broader than long, the apical two joints subequal. 

 Head and thorax smooth, faintly alutaceous. Abdomen 

 shining, longer than the thorax. Wings semifuscous ; 

 stigma and prostigma fuscous, nervures lacteous. 



Length 2 millim. 



The nervures are so colourless that I cannot make out 

 if the small oval cellule uniting the humeral cellules is 

 present or not ; if absent the species would form the type 

 of a new genus, as genera are now considered. 



Hab. Lanai. 



