Localities in which Pellagra is Prevalent. U7 



Collected adhering to the under sides of stones in Laurel 

 River, Corbin; Clear Creek, August 31; Cumberland River, 

 Pineville, August 31, 



Larva No. 2 (Parnidas). — A smaller and more slender 

 species of the family was taken from Laurel River at Corbin 

 in August. The preserved specimen is reddish brown, 

 dusted with black, the sutures at the sides sharply black. 

 Beneath yellow, with the black sutures at the sides con- 

 spicuous. Four white respiratory filaments behind the legs. 

 Length 9 mm. ; diameter 6 mm. 



Larva No. 3. — An elongate brown larva was taken 

 from Cumberland River, October 12, 1911, that appears to 

 belong to the order Coleoptera, but cannot be exactly placed 

 with the literature at hand. 



Elongate, brown, tapering to the posterior extremity, 

 with two dusky longitudinal lines along the middle of the 

 back and outside this a series of dots. Head well developed. 

 Three pairs of jointed legs. A brush of retractile hairs at 

 the posterior end of the body. These are thrust out when 

 the insect is detached from its hold on submerged plants or 

 roots and seem to be kept concealed when the insect is at 

 rest. It was found clinging to exposed roots in Cumberland 

 River in October, and lies lengthwise of the root to which it 

 clings, thus escaping observation. When detached it is 

 evidently uncomfortable, and returns as soon as possible to 

 any root or stick within reach, at once placing itself length- 

 wise of the object, and clinging tightly even when removed 

 from the water. Length 3 mm. 



TRICHOPTERA (CASE-FLIES). 



In working among the rapids of the rivers and creeks 

 I frequently came across pebbles secured together and 

 attached loosely to the under sides of rocks. They were 

 recognized as the shelters made by certain larvge belonging 

 to this group of insects. The insects construct a delicate 

 net between the pebbles, often of considerable size, so as to 

 catch floating objects suitable -for food. The shelters and 

 nets are often broken up and destroyed when the rocks are 

 moved, and the larvae are thus likely to be encountered 



