Packard.] 14 [May 7, 



Lepidopterous families inhabiting the Pacific States (Oregon, 

 Nevada and California, in distinction from the Atlantic States lying 

 eastward of, and including, the Mississippi basin). I shall reserve 

 for a final monograph of the family, now well advanced, a more com- 

 plete discussion of the geographical distribution of our Lepidoptera, 

 and it is hoped that much new material may be accumulated, either 

 to disprove or confirm the suggestions here thrown out, and which I 

 wish to be simply regarded as provisional and tentative. I am also 

 hampered in treating of the Californian Phalasnid fauna by our 

 scanty knowledge of the species of the Atlantic States, as the num- 

 ber of species which I have been able to accumulate is very small 

 compared with those known to inhabit Europe. 



The Phalffinid^e (Geometrids) of California (including Oregon and 

 Nevada) seem to be composed of four elements : 



1. Of species of genera exclusively American (North and South). 

 Such are Cliozrodes, Sicya y Hesperumia, Tetrads, Azelina, Gorytodes 

 and Metanema. Certain species of these, with several of Tephrosia 

 (a genus largely found in the New World) are the most characteristic 

 of the Pacific slope of the United States. 



2. The species next most characteristic belong to the following 

 genera : — Halia, Tephrina, Selidosema and Heteroloclia. Species of 

 these groups occur in Europe, but especially (all except Halia which 

 has a species, H. wavaria, living in northern Europe) in southern 

 Europe, around the Mediterranean Sea, Western Asia, and Asia 

 Minor; while species of Heteroloclia occur in Abyssinia and South 

 America (Quitoj. 



3. The next group comprises a few arctic or circumpolar species 

 of Coremia, Cidaria and Larentia, or of cosmopolite genera, such as 

 Hypsipetes, Cidaria, Coremia, Eupitliecia, Scotosia, Acidalia and 

 Boarmia. 



4. There are four species common to both the Pacific and Atlantic 

 States, viz., Larentia cumatilis, Camptogramma gemmaia, Tephrosia 

 Canadaria and Azelina Hubneraria. 



In the brief introductory remarks to the first part of this Catalogue 

 (these Proceedings, Vol. xiii, 381) we briefly alluded to the fact 

 that some Californian Lepidoptera repeat certain features peculiar to 

 the fauna of Europe. I find that there are but two forms strikingly 

 European among the Phalasnidas, viz., Numeria Californiaria Pack, 

 (wrongly described by me as Ellopia Calif or niaria, xnr, p. 384), 

 which is very near the European Numeria pulveraria, and quite dif- 



