THE CANADIAN ENTOMOLOGIST. 149 



Diagnostic Tabic of the Genera. 



A Anterior tibia; without the appendage (Hind tibiae, as a rule, with 

 only one pair of spurs). 



a. Antennae less than half the length of the front-margin of the 



fore wings. Apical joint of the palpi thick, blunt, coni- 

 cal. Body very slender i. Cyci.opides. 



b. Antennae half as long as the fore wings ; apical joint of the 



palpi slender, conical, rather acute, clothed all around 

 with hairs from the middle-joint to the end. Body 



stouter 2. Carterocephalus. 



B. Anterior tibia; with appendage, hind tibia; with two pairs of spurs. 



a. Antennal. club ovate or elongate, without a hook or acute 



point at the end. 



a. Apical joint of the palpi slender, subulate, erect. .3. Thy- 



melicus. 



b. Apical joint of the palpi short, conical. 



o. Hind-tibia; of the $ without a pencil of hairs. 



x. Fringe unicolored, club of antenna; curved, £ with- 

 out costal-fold 9. Thanaos. 



xx. Fringe checkered 6. Pyrgus A. & B. b. 



00. $ with costal-fold, and tuft on the tibiae .... 7. Scelo- 

 thrix. 



b. Club of antenna; lunate-falcate ; £ with costal-fold, and 



without the tuft on the tibiae 8. Nisoniades. 



c. Club of antennae slender, fusiform, at about two-thirds of its 



length bent at right angles ; $ without costal-fold, but 

 with tibial tuft 5. Catodaulis. 



d. Club of antennae ovate- or oblong, with a little hook or point 



at the end. Either with costal-fold or with tibial 

 tuft 4. Pamphila A, C and D. 



e. Club of antennae oblong, the apical fifth slender and some- 



what bent up, and rounded at tip. The rest as in 

 d 4 Pamphila B. 



f. Club of antennae bent behind the middle, thence narrowed to 



the tip. All the rest as in Pyrgus B. . . 6. Pyrgus B. a. 



