385 



Notes on the Entomology of Hawawiian Euphorhia with the 

 Description of a New Didijoplioi-odcJphdx 



(Jloniojiferd. Delpliacidac). , 



BY JOIIX COLBURX BIMDWELL. II' 



The eii(kiiiie llaAvaiiau species of Ewplwrhla form a nat- 

 ural group of closely related species, either shrubs or small 

 trees, ranging from the arid regions of the coastal belt to some 

 of the rainy ridges more than two thousand feet in elevation, 

 most conmionly growing on the dry ends of the lateral ridges 

 at the outer limit of native vegetation. They support a diver- 

 sified insect fauna which has as yet been very imperfectly 

 studied. Some beginning has been made upon this work on 

 Oahu but on the other islands the E uphorbiariimnR is practi- 

 cally unknown. These notes refer to Oahu only. 



At least one and proliably two or three species of Profcrlii- 

 nils feed in the larval condition in the wood of recently dead 

 stems and on reaching uuiturity emerge and live for a time on 

 the foliage on E. liUlchrandl on the lateral ridge leading out to 

 the eastward from ]Mt. Kaala in the Waianae range, on E. 

 clusiaefoJia on Kaumuohona ridge in the Koolau range, and on 

 E. multiformis on the Ewa ridge bounding Kalihi valley in the 

 same range, 



^Ir. Swezey has found the Phijcitid moths Geiioph-antis io- 

 doni and G. lealii, attacking the foliage of Eupltorhia, the for- 

 mer in the mountains, the latter in the lowlands. 



.V number of lletei'optera of the families Curcidae, Lygaei- 

 dae, and Miridae have been taken on Euplwrhia but have not 

 yet been worked up systematically nor has their biology been 

 studied sufficiently to be sure they are really attached to these 

 plants. One species of the Cicadellid (Jassid) genus Neso- 

 plirosyne has been taken attached to Euphorhia hiUebrandi on 

 the Kaala ridge and another upon what is considered by ]Mr. 

 C X. Forbes as a form of E. m uUiformis growing on the Ewa 

 coral plain near Sisal, a few feet above sea level. The Del- 



Proc. Maw. Ent. Soc, III, Xo. 5, April, 1918. 



