515 



The aedeagus and right genital style of /. pipturi are 

 figured (Figs. 11, 11a) at the same magnification as those of 

 /. hoehmcriae. 



Ilburnia chambersi (Kirk.). 



A small series on Raillardia ciUolata from Crater Road, 

 Kilauea, Hawaii {Giifard, July, 1919). 



Ilburnia geranii sp. n. Fig. 13, a. 



Male. Brachypterous ; length 2.2 mm., tegmen 1.7 mm. Vertex uearly 

 as broad as long, apex slightly rounded, base considerably before the 

 middle of eyes; length of face 2.2 times the width, sides slightly carved, 

 broadest in middle, median carina simple; antennae reaching to base of 

 clypeus, second joint twice the length of first, tegmina reaching to apex 

 of abdomen ; hind femora reaching slightly beyond apex of abdomen ; 

 tarsi subequal in length to tibiae, first hind tarsus as long as the other 

 two together. 



Opening of pygofer round, edges entire, dorsal emargination shallow 

 exposing anal tube, anal spines small, stout ; genital stjdes fairly short, 

 flat, narrowest in middle, apex truncate with inner angle slightly pro- 

 duced; aedeagus tubular with a dorsal projection at the base, apex acute 

 with orifice along ventral aspect of apex, a ring of eight or nine spines 

 about one-third from apex, a comb of five spines on the ventral aspect 

 just basad of the ring of spines; the armature on diaphragm forming a 

 raised knob with shagreen surface. 



Light brown; dark brown or black between carinae of face, gulae and 

 clypeus, on lateral portion of pronotum, over carinae of mesonotum, on 

 front and middle coxae, abdominal sternites and mediolateral portion of 

 tergites. Tegmina hyaline, a broad, irregular, fuscous band from apex 

 of costal cell to apex of clavus extending in middle down to junction of 

 media and cubitus, granules sparse, small, black, bearing short, black 

 maerotrichia. 



There is the usual amount of color variation, in some specimens the 

 dark fades out considerably. 



Female. Brachypterous; length 2.7 mm., tegmen 1.7 mm.; tegmina 

 reaching to apex of seventh tergite. In coloration lighter than the male, 

 some specimens being nearly uniformly light brown. 



Haleakala, Maui, 6000 feet elevation, on Gcranbiui arhorhim 

 (Timberlake, July, 1919). The young are light brown with 

 dark brown at base of tegminal pads and sides of abdominal 

 tergites. Described from eighteen males, sixteen females and 

 a number of young. This species comes next to /. acuta Muir, 

 but the aedeagus is easily distinguished by the large comb of 

 five teeth on the middle of ventral aspect. 



