85 



of genitalia common to the genus; it appears to have a tendency to- 

 wards the Euphydryas group, almost forming a connecting link be- 

 tween this genus and Melitaea. 



Euphydryas chalcedona Dbldy. 



The type specimen as figured by Doubleday and Hewitson (Gen. 

 Diur. Lep. PI. XXIII, Fig. 1) is a $ and shows no trace of red on 

 the upper side; it is erroneously listed as from Haiti but Boisduval 

 corrects this later to California and it is probable that the specimen 

 in question came from the neighborhood of San Francisco as the ma- 

 jority of specimens from this region before us either show no red or 

 only weak red marginal spots with occasional red spots in and beyond 

 the cell. Both Dr. Behr and Hy. Edwards agree in stating that the 

 larva is found feeding principally on Scrophularia and is black with 

 a dorsal row of orange tubercles and the base of the second lateral 

 row of tubercles also orange, no mention being made of pale dorsal 

 or lateral stripes (Proc. Cal. Acad. Sci. 1863, Vol. Ill, p. 90; 1873, 

 Vol. V, p. 167) ; their material was probably collected around San 

 Francisco. W. H. Edwards, however, describes the larva of chalce- 

 dona (Pap. IV, 63) from material received from W. G. Wright of 

 San Bernadino as feeding on Pentstemon and having a double whitish 

 dorsal stripe and a macular whitish stripe in line with the second 

 lateral spines the remainder of the description agreeing with that of 

 the above mentioned authors; this larval description exactly agrees 

 with that given by Rivers (Proc. Cal. Acad. Sci. 2nd. Ser. I, p. 

 103, 1888) of the larva of the species he separates from chalcedona as 

 macglashani from material taken at Truckee feeding also on a Pent- 

 stemon sp. ; the imago differs from typical chalcedona according to 

 Rivers in having the marginal red spots always well developed and 

 very frequently with prominent red spots in and beyond the cell of 

 primaries between the ordinary yellow patches ; a large series before us 

 from the type locality confirms this diagnosis ; specimens from Havilah 

 and S. Bernardino Co. in our collection agree with Truckee specimens 

 in showing generally this greater development of red color although 

 specimens occur from both localities that can scarcely be separated 

 from San Francisco Bay material. In the summer of 1915 Dr. Mc- 

 Dunnough found exactly similar larvae to those described by Rivers 

 and W. H. Edwards very common in the neighborhood of Duns- 

 muir, Siskiyou Co. on a Pentstetnon sp. and these also produced 

 imagines with strong tendency to develop the red markings although 



