180 



visited the same spot and searched in vain for these insects, 

 but from plants he bronght back numbers of nymphs hatched. 

 Xo parasites hatched from these eggs. The absence of nymphs 

 or adults from these plants while the eggs were present in 

 such numbers is curious, and would indicate that some enemy 

 made away with them upon their hatching. Ants (Pheidole 

 megacephala) were abundant all over the food plant and are 

 the only enemy we can attribute the absence of nymphs and 

 adults to. A large series of adults was obtained by rearing 

 the nymphs which hatched from eggs in the plants collected. 



PI. 2, fig. 19. 



4. .1. l-irl-aJdyi sp. n. 



^ Tegmina reaching just to the end of abdomen. Near to A. 

 ipomoeae but with face broader, with carinae and lateral edges more 

 arcuate. Pronotum, vertex, face and clypeus yellowish, fuscous on 

 pronotum between carinae and on outer edges; mesonotum dark 

 brown; legs yellowish, with indistinct fuscous longitudinal mark on 

 femora, abdomen yellow with brown spots, mostly on sides. Tegmina 

 hyaline, with indistinct fuscous mark across middle, darker and nar- 

 rower on hind margin at apex of clavus, wider but more indistinct 

 on costa; three or four small brown dots on apical margin; veins 

 whitish on basal and apical portions. 



The genitalia differ considerably from A. ipomoeae, the spines 

 on anal segment being longer and thinner, the styles flattish and 

 curving to a point at apex; the aedeagus also differs. 



Length 2.2 mm.; tegmen 1.6 mm. 



9 The female T associate with this is light brown with 

 slight infuscation on abdomen ; the infuscation on tegmina 

 much more indistinct. 



Length 2.7 mm. ; tegmen 2.0 nmi. 



Hab. Punaluu, Oahu (Swezey, June). 



I name this species after Mr, G. W. Kirkaldy, to whom 

 we are indebted for so much of our knowledge of Hawaiian 

 Delphacidae. 



PI. 2, fio'. 20; PI. 3, fiff. G.3. 



5. A. 



swezeyi sp. 



^ In structure this agrees with artemisiae except in genitalia. 

 Vertex, face and clypeus brown, darker along outer edges of carinae, 

 surface slightly granulated, antennae yellowish; pro and mesonotuni 

 brown, latter darker than former, legs lighter brown, abdomen brown 



