SOME AMERICAN GEOMETRID MOTHS CAPPS 129 



Female genitalia (fig. 25) similar to those of typical fiscellaria; 

 the internal band of ductus bursae somewhat more extenuated pos- 

 teriorly. It is doubtful if this difference will prove to be constant 

 in a large series. 



Type.—U.S.'NM. No. 14245. 



Type locality. — Zacualpan, Mexico. 



Food plants. — Unknown. 



Distribution, — Mexico: Zacualpan (Aug.). 



Five specimens examined. 



Remarks. — The examples of this species closely resemble those of 

 the preceding one, laeta, and also those of cation, which is treated next. 

 If the specimens of axion are correctly identified, as seems to be the 

 case, eventually calidaria and axion may prove to be the Lower Sonoran 

 and Tropical representatives of a single species, or an extreme southern 

 race of fiscellaria. Until there is more information and material from 

 the intervening areas of distribution, it seems desirable to treat them 

 as specifically distinct from fiscellaria. 



8. LAMBDINA AXION (Druce) 



Plate 4, Figures 10, 10A ; Plate S, Figuri: 23 



Thcrina axion Druce, in Biologia Centrali-Americana, Insecta, Lepidoptera- 

 Heterocera, vol. 2, p. 50, 1892 ; vol. 3, tab. 45, figs. 25-26, 1881-1900. 



Male. — Brownish ocherous, heavily sprinkled with fuscous; trans- 

 verse lines fuscous, evenly curved, rather weak, chiefly indicated by 

 dark marks on the veins ; the lines with conspicuous ocherous borders. 



Alar expanse, 27 mm. 



Genitalia (figs. 10, 10A) similar to those of typical fiscellaria', 

 aedeagus without an extenuated tip distally ; strongly extenuated pos- 

 teriorly (differences that may not be constant in large series). 



Female. — Similar to the male in color and markings. 



Alar expanse, 30-35 mm. 



Genitalia (fig. 23) with the ductus bursae long and narrow, at least 

 three times the length of posterior internal band (a doubtful character 

 which may not hold through a long series). 



Type. — In British Museum. 



Type locality. — Amula, Guerrero, Mexico (6,000 feet). 



Food plant, — Unknown. 



Distribution.— Guatemala : Guatemala City (July). Mexico: 

 Hidalgo, Orizaba, Zacualpan (Oct.). (Also recorded by Druce from 

 Las Mercedes, Guatemala, and Volcan de Chiriqui, Panama.) 



Five specimens examined. 



Remarks. — The specimens studied are in the National Museum col- 

 lection identified as axion, presumably by Dyar or Schaus; examina- 



