516 



Ilbumia sulcata sp. n. Fig. 4. 



Male. Brachypterous ; length 2.5 mm., tegmen 1.5 mm. Length of 

 vertex 1.4 times the width, apex slightly rounded with median carina 

 projecting in middle, base well behind the middle of eyes; length of face 

 2.3 times the width, slightly widest at apex, median carina simple but 

 base wide, showing trace of fork; antennae reaching beyond the middle 

 of clypeus, second joint 1.5 times the length of first; tegmina reaching 

 middle of sixth abdominal tergite; hind femora projecting slightly beyond 

 apex of abdomen, first tarsus longer than the other two together. 



Opening of pygofer about as long as wide, margins entire, dorsal 

 emargination shallow, not embracing more than half the anal segment; 

 anal spines large, flattened laterally, strongly curved outward, apices 

 acute; genital styles long, narrow, flat, outer margin slightly concave, 

 inner margin produced on basal third, apex truncate with the angles 

 slightly projecting, a slight ridge in middle near inner edge; aedeagus 

 large, flattened laterally, apex curved ventrad, a deep, longitudinal sulcus 

 along the dorsal surface from base to the curve near apex, three rows of 

 broad, flattened spines surround the apex at the point where sulcus ends, 

 three or four shorter rows basad of these, functional orifice at a]iex. 



Antimony yellow; a fuscous streak between the carinae of face, clypeus 

 and genae, a longitudinal, faint fuscous mark on femora, darker on hind 

 pair, faintly fuscous between carinae of nota. Tegmina hyaline, light 

 yellow, a black mark at apex of costal cell and another at apex of clavus, 

 veins slightly darkened, subcosta more so, basal margin of clavus black, 

 granules minute and sparse, bearing black macrotrichia. 



Female. Brachypterous ; length 2.7 mm., tegmen 1.6 mm. Hind femora 

 not reaching apex of abdomen ; tegmina reaching seventh abdominal seg- 

 ment. Young uniformly yellow. 



Ditch trail east of Keanae, Maui, elevation about 1500 feet, 

 on Cyrtandra sp. (Timberlake, July, 1919). Described from 

 two males, five females, and one young. The genitalia of this 

 species isolates it from all others. For the present I place it 

 next to /. maiiiensis. 



Ilbumia coprosmicola Muir. 



A series of both sexes and young from Kau desert, Kilauea, 

 Hawaii, elevation 3800 feet, on Coprosma ernodwides. There 

 is little difference in color compared with the type specimens 

 from 29 miles, Olaa, in spite of the difference in climatic 

 conditions. 



Ilbumia raillardiae (Kirk.). Fig. 18. 



A long series of both sexes and young on Ralllardia scabra 



