BUTTERFLIES OF MONTANA. 41 



dorsal side, and adorned with three small red dots on the central side 

 of the abdomen near the wing cases. The caterpillar eats Astragalus, 

 Thermopsis and white clover. 



Distribution The species is found in Colorado and the Mountain 

 region to the north and west of that state. In Montana it has been taken 

 at the University of Montana Biological Station at Bigfork, in 1903, at 

 Flathead lake. It is not common, and is rather difficult to catch, as it 

 keeps to the bushes and does not rest often. Brandegee has collected it 

 at Alhambra. A single frazzled and battered female was taken by Elrod 

 on MacDaugal Peak in the Swan range at 6,500 feet August 4, 1903, and 

 another August 1, 1904. 



SCUDDER'S SULPHUR. 

 Eurymus scudderi, Reakirt. 



Butterfly Expanse, 1.80 to 2.00 inches, 45 to 50 mm. Similar to- 

 alexandra. The male on tae upper side is colored like C. pholidice, but 

 the black borders are much wider. The fringes are rosy. The female 

 is generally white very rarely slightly yellow with very pale dark bor- 

 ders, or often without any trace of black on the outer margin of the wings. 

 On the under side the apex of the fore wings and the entire surface of 

 the hind wings are greenish gray. The discal spot of the secondaries is 

 well silvered and margined with pale red. 



Early Stages The larva feeds on the leaves of the huckleberry and 

 willow. Otherwise it is unknown. 



Distribution The species is found in Montana, Colorado, Utah, and 

 British Columbia. Wilsey's collection contains one specimen from Miles 

 City. We have not taken it west of the range. 



STRECKER'S SULPHUR. 

 Eurymus meadii, Edwards, var elis Strecker. Plate IV and Fig. 37. 



Fig. 37. Eurymus meadii, var. elis, left hand, female; right hand, male. 



Butterfly Expanse of wings 1.85 inches, 48 mm. Male; deep orange 

 red above, with wide black border fringed with red; wing veins in both 

 wings showing through black; black border covering outer third of fore 

 wings, a little less of hind wings; fore wings black at base, extending to 

 hinder angle of wings as a widening wash, ending in black scales over the 

 orange ground; posterior edge of the hind wings with greenish gray 



