513 



Female. Brachypterous ; length 3.5 mm.; tegmeii 2.4 mm. Tegmea 

 reaching to apex of eighth tergite. Similar in color to the male. 



Haleakala, Maui, elevation 6100 feet {Thnherlakc, July, 

 1919 j. Described from forty males and one hundred and 

 thirteen females and some young, taken on Sadie ria, the native 

 name of which is Amamau. The nymphs are uniformly light 

 brown. There is the usual tendency for some specimens to be 

 lighter than others and for the females to be lighter than the 

 males. This species comes next to /. painm Muir, to which it 

 is closely related. 



Ilbumia aku sp. u. Fig. 14, a. 



Male. Brachypterous ; length 2.5 mm. ; tegmen 1.8 mm. Vertex 

 considerably longer than wide, apex slightly rounded, the same width 

 as base, base about the middle of eyes; length of face 2.6 times the 

 width, slightly narrower at base than at apex, median carina simple; 

 antennae reaching beyond base of clypeus, second joint 1.8 times the 

 length of first; hind femora reaching to apex of abdomen, tibiae longer 

 than femora, first joint of hind tarsus slightly longer than the other 

 two together, spur with eight teeth; tegmina reaching slightly beyond 

 the apex of abdomen. 



Opening of pygofer large, the ventral edge somewhat straight, anal 

 angles produced and curved inward; anal spines well developed, situated 

 toward the base of the anal segment, their bases touching, slightly 

 curved and diverging; the armature of the diaphragm oval, shiny; genital 

 styles flat, slightly wider on basal half, apex truncate, sides sub- 

 parallel; aedeagus tubular, slightly flattened laterally, orifice at apex 

 which is sliglxtly enlarged, a small row of minute spines on ventral 

 aspect at apex and another on the right side of apex. 



Dark brown; antennae, carinae of head, metathorax, legs, and base 

 of abdomen yellowish, pleura and seventh and eighth tergites light. 

 Tegmina hyaline, yellowish, with a dark brown mark from apex of costal 

 cell to apex of clavus, more or less fading out in the middle. There is 

 a tendency in some specimens for the carinae of thorax to be light. 



Female. Brachy])terous; length 2.7 mm.; tegmen 1.8 mm. Similar 

 to male, but hind femora not reaching to apex of abdomen. 



Olaa, 23 miles, Hawaii, elevation 2300 feet, feeding on 

 Cyatica tritoinantha (native name Aku). Described from eleven 

 males and three females ( Gi^arc?, January, 1919). 



This species is fairly isolated. At present I would place it 

 near to /. hlackburni. It is possible that it comes near to /. 



