IO ENTOMOLOGICAL NEWS. [Jan., '17 



The large red forms with the richly veined wings, appeared 

 at first sight more than generically distinct from the various 

 small dark species and my interest and surprise increased 

 steadily as I examined species after species and found 

 throughout almost identical penes. The study of the penes 

 but confirms the opinions expressed by McLachlan* and Per- 

 kins that in spite of their diverse forms these Hawaiian 

 species of Agrionines are so closely related inter sc that it is 

 questionable whether they should not remain as a single genus. 



The figs, i to 38 show, better than I can describe, the uni- 

 formity in structure throughout this group. Probably it ex- 

 tends to those Hawaiian species in which the penis has not yet 

 been examined. t This form of penis is peculiar among agrio- 

 nine penes in that the third or apical segment is offset, or at- 

 tached subapically to the second segment. The apical lobe 

 has an apical, sagittal cleft, which in all but three species is at 

 least half the length of the lobe in depth. All have the inter- 

 nal soft fold, but in all the terminal soft fold of segment two 

 is lacking, unless it is homologous with that part of the apex 

 of segment two which lies beyond the insertion of segment 

 three. All degrees of spininess exist from no spines to a com- 

 plete row along each side of the shaft. 



The following classification is that of Perkins^ and is based 

 on the male appendages as the most constant character : 



Group i. xanthomclas, pacificinn, nigrohamatum. 



Group 2. oresitrophnm, or abates, Icptodcmas, calliphya. 



Group 3. koelense, asteliae, amaurodytnm, cndytnin, adytum. 



Group 4. ncsiotes. 



Group 5. oahucnsc. 



Group 6. dcccptor, vagabundum, kauaicnse, molokaicnsc, jugontin. 



Group 7. oceanicum, blackburni, hetcrogamias. 



This does not include calvcrti or williamsoni the relation- 

 ships of which species Perkins does not indicate. 



*Ann. and Mag. Nat. Hist. (5), Vol. 12, p. 240. 



t While studying the collection in the Museum of Comparative 

 Zoology, Cambridge, Mass., I was able to examine molokaiense and 

 the fallax and waianacanum varieties of amaurodytum. These all 

 have the typical form of penis for this group. 



JFauna 1 Javvaiiensis, Vol. II, p. 694. 



