34 GROTE — SPECIALIZATIONS OF LEPIDOPTEEOUS WING. [April 7, 



the neuration to contradict main features in the definition of Papilio. 

 They appear, on the whole, to be somewhat generalized forms, 

 from the usually straight internal vein of hind wings. 



Priamides pompeius. 



Primaries rounded at tips; outer margin even, medially hollowed 

 out, so that the wing may be described as subfalcate. Cubital 

 cross-vein continuous to vii. Secondaries with praecostal spur con- 

 tinued to the margin, humeral cell moderate, internal vein some- 

 what bent, no tail, outer margin regularly scalloped. 



Ithobalus polydamus. 



Agrees \N\th. Friaj?ndes in shape of primaries, outer margin a little 

 scalloped. Secondaries with internal vein straight, outer margin 

 as in Priamides. Praecostal vein shorter, not reaching margin. 



Par ides echeliis. 



Primaries pointed, with sharp tips; external margin even, nearly 

 straight. Hind wings with the outer margin produced between iva 

 and V2, scalloped, without prominent tail. Internal vein straight, 

 or even a little bulging. Vein iiig arises a little beyond cross-vein, 

 and herein is this form specialized. 



The following type seems related to those immediately preceding : 

 Iliades 7?iemnon, 



The fore wings are intermediate in shape between Priamedes and 

 Parides ; the apices are blunt, while the outer margin is nearly 

 straight. The tailless hind wings have the outer margin very 

 slightly scalloped. The venation generally agrees ; the internal 

 vein of secondaries is straight. 



I have been unable to obtain material of the butterfly *' Troides 

 helena L.," which Scudder gives as the type of Hiibner's genus 

 Troides, Verz. ZZ, a generic name which has then apparently been 

 wrongly used for the type Ornithoptera priamus L. Specimens of 

 ^^ Papilio helenus,''^ received from Dr. Staudinger and examined by 

 me, do not differ from Alenelaides polytes in venation ; the " tail " 

 is merely a little longer. 



The last type I have been able to examine is : 

 Troilides torquatus. 



The neuration agrees in every detail with that of Heraclides 



