236 



21. Middle of the median interspaces of fore wings unprovided witli white 



spots Dnnaida. 



22. Palpi not so long as the thorax (Najades) 23. 



22. Palpi much longer than the thorax (Hypati) Hjpatus. 



23. Upper surface of tarsi devoid of spines 25. 



23. Upper surface of tarsi spiny 24. 



24. Cell of both wings closed (Dryades) 49. 



24. Cell of both wings open (part of Praefecti) 36. 



25. Second superior subcostal nervule, thrown out before the first inferior 



subcostal nervule (i. e. before the apex of the cell) 28. 



25. Second superior subcostal nervule of fore wings arising at or beyond the 



first inferior subcostal nervule 26. 



26. Cell of hind wings open 27. 



26. Cell of hind wings closed (Hainadry ades) 55. 



27. Last palpal joint fully one third the length of the penultimate 



(part of Praefecti) 36. 



27. Last palpal joint about one fourth the lengtii of the penultimate 



(part of Arg'oiiantae) 30. 



28. The vein closing the cell of fore wings strikes the median nervure either 



nearly or quite as far beyond its second divarication, as half the dis- 

 tance between the base of the first and second median nervules ; or else 

 before the second divarication * part of Praefecti) 36. 



28. The vein closing the cell of fore wings strikes the median nervure op- 



posite, or just beyond its second divarication * 29. 



29. Palpi stout and distinctly tapering (part of Argoiiautae) 30. 



29. Palpi rather slender and of uniform size throughout, excepting of course 



at the extreme tip (Arcliontes) 34. 



80. Hind wings tailed 31. 



30. Hind wings not tailed 32. 



31. Costal nervure of fore wings terminating a little beyond the middle of 



the costal border Coea. 



31. Costal nervure of the fore wings terminating close to the apex. . . Anaea. 



32. Fore wings produced at the apex 33. 



32. Fore wings not produced at the apex Smyrna. 



33. Penultimate superior subcostal nervule running parallel with the sub- 



costal nervure for half its length, then suddenly diverging from it 



Historis. 



*Iii ^naea, one of the Argonautae, the connecting vein strikes the median nervure far be- 

 yond its second divarication, but it niiiy at once be distinguished from the Praefecti of this cate- 

 gory by its excessively short terminal palpal joint, which is not one-eighth the length of the 

 penultimate. 



Two other genera, one of Argonautae (Histoiis), the other of Praefecti (Junonia), have the 

 cell open, and to them, ttuMefore, neither of these categories arc applicable. In the Argonaut, 

 the cell (measuring from its base to tlie origin of the inferior subcostal nervules) is more than one- 

 third, in tlie Praefect less tlian one thini tlie length of tlie wing. By these statements, all these 

 forms may readily be referred to their proper groups. 



