HETEROCERA. 



197 



The first type-citation for the genus Helioihis Ochsenheimer appears to be 

 that of D. Thon in Ersch and Gruber, Allgemeine Encyclopadie der Wissenschqften, 

 Section II, Part 5, p. 131, where we find the definite statement : " Als Typus 

 beschreiben wir : H. dipsacea Linn." 



The use of the generic name in this sense was well established long before 

 any attempt was made to upset it, and there was no need for any change to be 

 made. When the trivial name armigera was supplanted by obsoleta Fabricius, 

 this was done contrary to the rules and accepted practice in nomenclature. 

 Bombyx obsoleta Fabricius, Ent. Syst., Ill (1), p. 465, 1793 (non Fabricius, 1775), 

 is an absolute homonym. 



14. Heliothis assulta Guenee. 



Helioihis assulta Guenee, Species General des Lepidopteres , Nod., ii, p. 178, 1852. 

 Heliothis separata Walker, List Lep. Ins. B. M., xi, p. 691, 1857. 



Chloridea assulta Guenee, Rebel, 2 Beiheft Jahrb. Hamb. Wiss. Anstalt., xxxii, pp. 125, 144, 1915. 



This record is based on two males in the British Museum collection, one of 

 these being Walker's type of H. separata. These two specimens are labelled 

 " Navigators' Islands," the old name of the group. Rebel merely repeats 

 Walker's record. 



Hadeninae. 

 15. Tiracola plagiata Walker (Plate VIII, fig. 2). 



Agrotis plagiata Walker, List. Lep. Ins. B. M., xi, p. 740, 1857. 



Upolu : Malololelei, 2,000 feet, 13 6, 7.vii.l924 ; 7 $£, 5, 6, 7.vii.l924. 

 Tutuila : 1 $, iv.1918 (Kellers) ; Pago Pago, 2 ii.1924 (Steffany). 



16. Tiracola rufimargo samoensis, subsp. n. (Plate VIII, fig. 1). 



Palpus pinkish buff, the first and second segments with chocolate to 

 fuscous black shading laterally. Antennal shaft pinkish buff irrorated with 

 terra cotta to fuscous. Head with frons pinkish buff, vertex greyish olive. 

 Thorax greyish olive streaked with drab and benzo brown, with a prominent 

 patch of fuscous black on the mesothorax posteriorly. Abdomen pinkish buff, 

 dorsally almost entirely suffused with benzo brown, except for the ochraceous 



