THE BIRDS OF NORTHERN THAILAND 233 



My entire series of six northern specimens were, by chance, taken 

 between November 7 and March 28; at this season all are in fresh, 

 clean plumage and have the gonads quite inactive. 



The male has the forehead and forecrown shining red; the super - 

 cilium, hindcrown, and center of the nape black, more or less mixed 

 with gray; the sides of the head uniform gray, edged below by a 

 narrow, black streak; the remaining upperparts bright olive-green, 

 with the rump and lower back bright yellowish green and the exposed 

 portions of the wings strongly washed with bronze ; the remiges and 

 rectrices blackish, the former with small white spots at the margin 

 of the outer vane, the latter more or less washed with bronze and 

 indistinctly barred with grayish toward the base; the throat green- 

 washed gray, changing gradually to a uniform olive-green on the 

 remaining underparts. The female resembles the male but has the 

 entire crown black, streaked with gray. 



P. c. hessei is distinguishable from the following race only by its 

 rather larger bill, the length of which (in adults) normally exceeds 

 40 mm. 



PICUS CANUS GYLDENSTOLPEI Stuart Baker 



Assamese Black-naped Green Woodpecker 



Picus cartas gyldenMolpei Sttjabt Baker, Bull. Brit. Orn. Club, vol. 39, 1918, 

 p. 19 (Sadiya, Lakhimpur, Assam). 



This more northern form of the black-naped woodpecker is ap- 

 parently a very rare winter visitor to northern Thailand: the only 

 record is based upon an adult male taken by me on Doi Suthep at 4,500 

 feet, November 7, 1936. 



In favor of my conclusion that this specimen, with bill only 36 mm. 

 in length, was truly an extralimital wanderer rather than an abnor- 

 mally small-billed example of the resident form, the following points 

 of evidence may be adduced : 



1. In a series of 29 adults (including 14 females) of hessei from 

 all parts of Thailand, not one has the bill measuring less than 40 mm. 



2. My bird was solitary and was shot along a narrow track through 

 dense evergreen at 4,500 feet ; thus, not only was it in a type of forest 

 always, in my experience, avoided by hessei, but it represents the sole 

 record for the species on Doi Suthep above 3,200 feet (at which eleva- 

 tion it is exceptional) and was taken 1,300 feet higher than the species 

 has otherwise ever been observed in Thailand. 



3. The example of gyldenstolpei is molting the two outermost pairs 

 of remiges and the central pair of rectrices; an adult male of hessei 

 (with bill measuring 43.5 mm.) collected on the same day and on the 

 same mountain, but at only 2,500 feet, has entirely completed the molt. 



