28 



NEW SPECIES AND RACES OF CUCULLIANAE, 



WITH NOTES ON THE GENERIC POSITION 



OF LATHOSEA, GRT. AND RANCORA, SM. 



Lathosea, Grt. 



1882, Grt., Bull. Geol. Surv. Terr., VI, 270, pulla. Grt., sole species and 

 therefore type. 



Rancora, Sm. 



1892, Sm., Ent. News, III, 253, pi. X, f. 1, strigata, Sm., sole species and 

 therefore type. 



These two genera are doubtfully distinct. The main differences 

 are that the eyes of Lathosia are more heavily ciliated than those of 

 Rancora, and the latter always possesses a conspicuous black spot on 

 the discocellular vein of each of the secondaries, below; which spot 

 is connected to the base of the wing through the center of the cell 

 by a heavy black band. The black spot and band reminds the authors 

 of some of the secondary sexual structures in the Phycitinae, and 

 perhaps it has some sexual or glandular significance in this case, 

 although present and of equal intensity in both sexes. The maculation 

 is mainly of a longitudinal character. 



In Lathosea the eyes are so heavily cihated that the cilia nearly 

 meet from before and behind; while the black spot and dash on the 

 secondaries, below, is but little developed and can be discerned in 

 only about 40% of the specimens. The male antennae are some- 

 what more heavily pectinate than in Rancora, but a new species de- 

 scribed below is somewhat intermediate in this character. The mark- 

 ings are both longitudinal and transverse. 



The character on which these two genera are separated by Sir 

 George Hampson, Cat. Lep. Phal. B. M., IV, is: "tegulae more or 

 less strongly produced behind into a hood" for Rancora which he 

 places as a subgenus of CucuUia; and, "tegulae not produced behind 

 into a hood" for Lithosea. It is apparent, from a long series of 

 specimens representing all known species of both genera that the 

 moths have the power to raise or flatten the tegulae, a hooded effect 

 being present or absent in the species of both genera. 



