On the Dermal Sense- Organs of the Crustacea. 299 



A. Woodfordi, $ ndult. 



Back of the neck, Dark cliestnut-rufous, 

 back, and scapu- 

 lars : 



A.Jlavicollis, $ adult. 

 Ashy brown, slightly glossed. 



Rump and upper Ashv black, fringed with cinna- Ashy brown, 

 tail-coverts : mon-rufous. 



Whole of the under Cinnamon-rufous, becoming more Lower part of the cheeks, sides 



surface : 



cinnamon and less rufous be- 

 low the breast. Throat and 

 neck flecked with small dark 

 shaft-spots. 



Culmen 



31. 



Tarsus 27. 



Middle 

 claw . 



toe and 



2 1. 



of the throat, and neck cinna- 

 mon. Feathers of the chin, 

 front of throat and neck, and 

 chest dull chestnut, shading 

 into dark grey towards the 

 extremities, and somewhat 

 widely and irregularly mar- 

 gined on one or both webs with 

 white. Breast and uuderparts 

 blackish grey, edged and 

 fringed with whitish or buff 

 on the belly. 



3-4. 



2-6. 



2-8. 



I think anyone taking- the trouble to com})avc the above 

 characters and measurements will have no further doubt that 

 A. Woodfordi is a very distinct bird ; the proportion of the 

 middle toe and claw to the tarsus shows this at a glance, for 

 in the Solomon-Island bird the tarsus is much the longer, 

 while in A . flavicoUis \t is somewhat shorter. 



Gates, in his ' Birds of Burniah,' ii. p. 255, is no doubt 

 somewhat in error in describing tlie male and female of A. 

 flavicoUis as similar in plumage, for the female never has the 

 slate-grey upper and underparts so conspicuous in the adult 

 male. 



XL. — A Contribution to the Knowledge of the Dermal Sense- 

 Organs of the Crustacea. By Dr. Otto VOM Rath *. 



I HAVE been engaged for along time upon comparative studies 

 on the dermal sense-organs of Arthropods, and have already 

 published accounts of my investigations on Myriapods and 



* Translated from the 'Zoologischer Anzeiger,' xiv. Jahrg, no. 305, 

 pp. 195-200, and no. 306, pp. 205-214, June 1891. 



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