BAGWORM MOTHS OF THE WESTERN HEMISPHERE 105 



anterior end; walls of case thin, flexible in male, distinctly thicker 

 and firmer in female. 



Types. — Lost (P. bergii). In the Zoologische Sammlung der Bayer- 

 ischen Staates (cotype, 0. ouiformis) . 



Type locality. — Argentina {P. bergii) ; Mendoza, Argentina 

 (0. oviformis). 



Recorded hosts. — "Fabaceae: Cassia ajjhijlla Cav." (Weyen- 

 bergh, 1884); 'Trosopis stromhulirfera Bonth." (Koeliler, 1939). 



Distribution.^ — (Map 9.) Present records indicate that this insect 

 occurs from the Argentine Pampas west to the Andes. 



Discussion. — The larval cases, with their unique structure and 

 peculiar sexual dimorphism, are very distinctive. The adult moths, 

 however, have differentiated far less and are identical to, or superfi- 

 cially very similar to, certain other members of this subgenus. The 

 antennae of 0. bergii (and of the following species 0. borsanii) are 

 somewhat distinct in that they are characteristically less broadly 

 pectinated than those of the other members of the genus Oiketicus. 



Since the original description of P. bergii offers relatively few diag- 

 nostic characters for this species, the description largely has been 

 ignored by later workers. Certain essential characters mentioned in 

 this description, however, seem to show that ^'Clariia" oviformis, a 

 species later described by Koehler, is actually Weyenbergh's species. 

 Several adult males and larval cases of C. oviformis were examined 

 and were found to agree with Weyenbergh's description of P. bergii. 

 The original drawing of the larval case, its measurements, and the 

 overall description of the male are essentially the same. 



Six additional male specimens from southern Brazd and Argentina, 

 representing perhaps three new species, also could have been named 

 at this time, but, because of the paucity of diagnostic characters in 

 the adult and the lack of knowledge of the immature stages, this has 

 not been done. In regard to general structure, these moths are very 

 similar to 0. bergii and 0. borsanii. 



Material examined.— 4 d^cf, 1 9, 21 cases: 



ARGENTINA: Cordoba, 2 cases, BM; 6 cases, ZSBS; 3 cases, USNM. Cor- 

 doba, Rio Cebajjos, 9, ZSBS; case, BM. Mendoza, 4 cfcf, ZSBS. Prov. of 

 Mendoza, 6 cases, ZSBS. San Juan, case, BM; 2 cases, USNM. 



43. Oiketicus borsanii (Koehler) 



Figures 42, 94; Map 9 



Clania borsanii Koehler, Rev. Soc. Ent. Argent., vol. 16, no. 1, p. 23, fig. 7, 1953. 



Male. — (Fig. 42.) Similar in all observable respects to 0. bergii. 

 Wing expanse 24 mm. 



