200 NORTH AMERICAN BUTTER! LIES. 



555. PYRGUS NEARCHUS Edw. 

 Arizona Cheker. 

 Upper side brownish black, grayish at base ; on fore wings is a row 

 of white dots and an incomplete sub-marginal row, distinct only next 

 inner margin ; on upper margin is a line of four white spots, outside 

 these a double spot, and below this another spot ; crossing both wings 

 is a broad while band, on hind wings is a row of sub-marginal crescents; 

 black and white fringed. Lower side pale greenish brown, spots repeat- 

 ed, upper margin whitish, hind wings clouded with greenish brown and 

 whitish. Expands 1.20. Habitat, Arizona. 



556. PYRGUS TESSELATA Scud. 



Tesselated Checker. 



Plate X, 8. 



Brown above, brown and white fringed, four rows of white spots on 



fore wing, three on hind pair, the first outer dots, seccnd larger, and the 



third large and nearly confluent. Beneath, paler, with spots enlarged. 



Expands 1.00 to 1.35. Habitat, Pennsylvania to the Gulf of Mexico 



and from the Atlantic to the Pacific, also British America. 



557 PYRGUS CENTAUREAE Ramb. 

 Black Checker. 

 Black above, brown-tinged; a bar at end of cell on fore wings, a 

 less distinct spot in cell and a sub-marginal row of spots and five spots 

 on upper margin, all white. Hind wings with two obscure rows of white 

 spots ; a little paler beneath, spots repeated on fore wing, enlarged ; on 

 hind wings are three rows of spots. Expands 1.25. Habitat, New 

 York, West Virginia, Colorado, and Labrador. 



558. PYRGUS PHILETAS Edw. 



Texas Checker. 

 Similar to P. tesselata above, and below on fore wings ; hind wings 

 beneath differ in being yellowish, in having no central band, the basal 

 two-thirds of wing being whitish with a few brown dots and streaks, on 

 outer margin are three rows of minute spots. Expands 1.20. Habi- 

 tat, Western Texas. 



559. PYGUS COESPITABIS Bd. 

 Two-banded Checker. 



Black above, with two bands of white spots, and two white spots 



