644 BULLETIN 50, UNITED STATES NATIONAL MUSEUM 



KEY TO THE SPECIES AND SUBSPECIES OF SALPINCTES. 



a. Under parts only partially, if at all, streaked, spotted, or barred. 



b. Throat and chest more or less streaked (the streaks sometimes nearly obso- 

 lete) ; upper parts with whitish specks or dots, at least on lower back and pos- 

 terior scapulars. (Adults.) 

 c. Wing relatively longer, bill shorter (wing more than three and a half times 

 as long as exposed culmen, averaging 69 or more in male, more than 67 in 

 female; exposed culmen averaging less than 20 in male, less than 19 in 

 female) ; coloration paler. 

 d. Bill more slender. (Continental forms.) 

 e. Larger (male averaging, wing 71.3, tail 53.9, exposed culmen 17.8, tarsus 

 21.2, middle toe 13.7; female, wing 69.4, tail 52.2, exposed culmen 17.5, 

 tarsus 20.7, middle toe 13.4); coloration slightly paler. (Western 

 United States, and north to British Columbia, south to central Mexico.) 

 Salpinctes obsoletus obsoletus, adults (p. 645) 

 ee. Smaller, .with larger bill and feet (male averaging, wing 70.8, tail 50.2, 

 exposed culmen 18.2, tarsus 21.5, middle toe 14.2; female, wing 68.8, 

 tail 48.7, exposed culmen 17.8, tarsus 20.3, middle toe 14); coloration 

 slightly darker. (Southern Mexico. ) 



Salpinctes obsoletus notius, adults (p. 648) 

 dd. Bill stouter. (Island forms. ) 



e. Paler, the general color of upper parts light buffy brown; male, wing 71, 

 tail 51, exposed culmen 20, tarsus 21.5, middle toe 14.5. (San Nicolas 



Island, California.) Salpinctes obsoletus pulverius, adults (p. 649) 



ee. Darker (coloration much as in S. o. obsoletus); male averaging, wing 

 70.9, tail 55.7, exposed culmen 18.7, tarsus 21.2, middle toe 14.5. 

 (San Benedicto Island, northwestern Mexico.) 



Salpinctes obsoletus exsul, adults (p. 650) 

 cc. Wing relatively shorter, bill longer (wing less than three and a half times as 

 long as exposed culmen, averaging 67.2 in male, 65.1 in female; exposed 

 culmen averaging 21 in male, 20.5 in female); coloration darker. (Guada- 

 lupe Island, Lower California.) 



Salpinctes obsoletus guadeloupensis, adults (p. 650) 

 bb. Entire under parts immaculate; upper parts without any whitish dots or 

 specks. ( Young.") 

 c. Upper parts paler (pale cinnamon-brownish) very faintly, if at all, barred 



with dusky Salpinctes obsoletus obsoletus, j'oung (p. 645) 



cc. Upper parts darker (dull grayish brown), distinctly barred with dusky. 



Salpinctes obsoletus notius, young ^ (p. 648) 

 Salpinctes obsoletus guadeloupensis, young ^ (p. 650) 

 aa. Under parts wholly spotted or barred with dusky. 



b. Abdomen and flanks spotted. (High volcanoes of Salvador; Yolcan de jMira- 



valles, Costa Rica ?) Salpinctes guttatus ( p. 653) 



bb. Abdomen and flanks barred or banded. 

 c. Flanks barred with dark brown or dusky. (Department of Quiche, northern 



Guatemala.) Salpinctes maculatus (p. 651) 



cc. Flanks and abdomen barred (more densely than in preceding?) with black. 

 (Volcan el Viejo, Nicaragua.) Salpinctes fasciatus (p. 653) 



« The young not seen of S. o. pulverius, S. o. exsul, S. o. riotins, and the three 

 remaining Central American forms. 



^I have not been able to discover any color differences between the young of these 

 two forms. 



