517 



from 25 miles, Olaa, Hawaii, elevation 2300 feet. A small 

 series on Raillardia ciliolata from the a-a flows, Kan desert. 

 Hawaii, 3800 feet elevation {Giffard, June, July, 1918). 



Ilbumia neoraillardiae sp. n. Fig. 17. 



Male. Braehypterous; length 2 mm., tegmen 1.4 mm. The external 

 characters of this species are similar to those of /. raiUardiae (Kirk.). 

 In the genitalia the aedeagus is proportionally longer and not so deep, 

 the genital styles are not so long at the apical outer angle and the inner 

 edge is not so concave. The species are veiy closely allied. 



Buckthorn brown or ochraceous tawny, lighter at base of abdomen and 

 darker on abdominal dorsum; apex of genital styles dark. Tegmina light 

 tawny, veins obscure, granules very minute bearing small, black macro- 

 trichia. 



Female. Braehypterous. Similar to male. Length 2.4 mm. ; tegmen 

 1.9 mm. Macropterous. Length 2.7 mm.; tegmen 3.0 mm. 



Described from forty-seven males and thirty-six females 

 from Kahuku. Kau, Hawaii, elevation 1800 feet, feeding on 

 Lipochaeta suhcordata {Giffard). 



Ilbumia ipomoeicola (Kirk). 



A long" series of males, females and young from Kakuku, 

 Kau, Hawaii, elevation 1800 feet, on Ipomoea sp., in which are 

 represented the light and dark forms and also intermediate. 

 {Giffard, July, 1918). Four males and seven females and 

 young from Lower Puna, Hawaii, elevation 30 feet, on Mu- 

 citna giganfca {Giffard, August, 1918). There are dark forms 

 tending towards the intermediate. 

 Ilburnia gigantea sp. n. Fig. 15. 



Male. Braehypterous; length 4.5 mm., tegmen 2.5 mm. Length of 

 vertex nearly double (1.8 to 1) the width at base, projecting considerably 

 beyond the eyes, apex slightly broader than the base, the carinae form a 

 broad projection in the middle of the apex, base at middle of eyes; length 

 of face 2.7 times the width, sides slightly arcuate, widest in middle, the 

 furcation of median carina forming a thickened ridge on basal third; 

 antennae reaching to the middle of clypeus, second joint 1.6 times the 

 length of first; femora not reaching to apex of abdomen, tibiae longer 

 than femora, first tarsus longer than the other two together, spur with 

 ten teeth. 



Brown ; carinae of head and thorax lighter, antennae and legs mottled 

 light and dark, light over abdominal pleura and in middle of tergites. 

 Tegmina hyaline, yellowish, black over veins except the apical, a dark 

 mark at apex of cla^-us and at apex of costal cell. 



