( 654 ) 



This jiciuliar sjiecius Las generally been associated with P. zagreus. However, 

 its true position is near P. cacicus and P. loarscewiczi, with which it agrees in the 

 short antenna, serrate costal margin of the forewing, the short cell of the hindwing, 

 the origin of the subcostal vein of the hindwiug from close to the base of the 

 subbasal cellule, the hairs of the underside of the body and hindwing, and in 

 the genitalia (of 6, ? not examined). The hindwing has lost the tails and the 

 markings, only the submarginal row being represented by two or three orange 

 spots situated from anal angle forwards, the row heing sometimes continued by 

 some olive-bnfF spots. The cell-patch of the forewing and the three discal spots 

 W — M- correspond to the respective spots of P. cacicus, the two posterior discal 

 spots being prolonged as in P. aristeus bitias, nsnally touching the submarginal 

 dots, which are homologous to the posterior orange submarginal spots of P. cacicus. 

 On the UDclerside the pattern of the forewing agrees often rather closely with that 

 of P. cacicus cacicus ?-f zaddachi in tlie discal row of patches being continued 

 to costal margin by some orange and creamy spots situated at the distal side of 

 the cross-veins. 



Genitalia : tj. Tenth tergite very broad, rounded at ape.x, beneath at base 

 transversely dilated as in P. cacicus ; sternite on each side with only one long 

 acute process, which is somewhat angulate on the anal side ; this process is 

 homologous to first and second process of P. cacicus, the first process being 

 shifted nuad in P. euterpinus and the two processes having become merged together, 

 the small projection on the hiuderside of the long process of P. euterpinus being 

 homologous to the second process of P. cacicus. Harpe as in P. cacicus, but a 

 little longer, not so completely fused with the clasper, th« edges and especially 

 the acuminate apex being free. 



Early stages not known. 



Hab. West Colombia ; Ecuador ; North Peru. 



In the Tring Museum 2 Si from: Sante Inez (R. Haensch) ; Zamora 

 (0. T. Baron). 



In coll. Oberthiir 7 c? <? from : Honda, AVest Colombia ; Moyobamba and 

 Chachapoyas, Peru. 



A ? in coll. H. Grose-Smith from Chiqninda. 



SECTION III.— KITE-SWALLOWTAILS. 



(For characters see p. 434.) 



There is considerable divergency among the New- World Kite-Swallowtails, the 

 American forms presenting a greater variety in structure, shape, and pattern than 

 the Old- World species. The two types of hindwing, the tailed triangular type 

 and the non-tailed rounded type, which we find in the Eastern Hemisphere, obtaia 

 also in America, but here the two types are connected by a third type, a more or 

 less rounded hindwing bearing a thin tail {dolicaon and allies). The development 

 of the subcostal veins of the forewing exhibits interesting features in this Section of 

 Papilios. In one of the American species the first subcostal is lost {bellerophon) — 

 the only instance among true Swallowtails of a reduction in the number of veins. 

 We take as the most generalised state that venation in which the five subcostals 

 are all present, and end free in the margin of the wing. This state obtains in a 

 large percentage of American species, while only two Old- World species have the 

 same neuration — namely, the Palaearctic poclalirius and the Australian leostkenes, 



