Vol. XXXl] ENTOMOLOGICAL NEWS I65 



fore to reckon with the fact, that these appendages are not 

 only organs of the tactile and olfactory sense but also of the 

 sense of heat perception. It may be of interest in this con- 

 nection that, at the moment of biting, the Anopheles mosquito 

 will lift the two long palpi at right angles to the proboscis; 

 these might be supposed to be the seat of heat-perception 

 but according to Graber the function of the palpi is olfactory 

 and this even to a higher degree than in the antennae. 



Literature Quoted 



Graber, V. 1882. Die chordotonalen Sinnesorgane und das Gehor 

 der Insekten. Zeitschr. f. mikrosk. Anat. Vol. XXI, p. 132-133. 



Howxett, F. M. 1910. The Influence of Temperature upon the 

 Biting of Mosquitoes. Parasitology-, Vol. Ill, pp. 479-484. See also 

 Patton, \V. S. and Cragg, F. W., A Textbook of Medical Entomology-, 

 London, Madras and Calcutta, 1913. 



Jennings, H. S. 1906. Behavior of Lower Organisms, pp. 70-72. 



Lodge, Olive C. 19 18. An Examination of the Sense Reactions of 

 Flies. Bulletin of Entomological Research, Vol. IX, Part 2, pp. 91-176. 



Loeb, J. 1918. Forced Movements, Tropisms and Animal Conduct. 

 Philadelphia, J. B. Lippincott Co., p. 155. 



Marchan-d, W. 1917. Notes on the Habits of the Snow-Fh- (Chi- 

 onea). Psyche, Vol. XXIV, Xo. 5, p. 142-153. 



Id. 19 18. First Account of a Thermotropism in Anopheles punctipennis, 

 with Bionomic Observations. Psyche, Vol. XXV, Xo. 6, p. 130-135. 



Mendelssohn, M. 1895. Ueber den Thermotropismus einzelliger 

 Organismen. Arch. ges. Physiol. IX, 1-27. 



Id. 1902 a. Recherches sur I'interference de la thermotaxie avec d' 

 autres tactismes et sur le mecanisme du movement thermotactique. 

 Jour. Physiol, et Pathol, generale, IV, 475-488. 



Id. 1902 h. Quelques considerations sur la nature et le role biologique 

 de la thermotaxie. J Physiol, et Path generale, IV, 489-496. 



Stahl. 1884. Zur Biologic der ^lyxomyceten. Botan. Zeitg. See 

 also O. Hertwig, Allgem. Biologic, 2. Auflage, p. 147. 



The Spider of Saltair Beach (Arach., Aran.) 



By Ralph V. Chamberlin, Cambridge, Massachusetts. 



About ten years ago the newspapers of Salt Lake City 

 gave considerable space to accounts of what was characterized 

 as "a plague of spiders" at the Saltair Beach resort. Great 

 Salt Lake. At that time spiders were recorded as occurring 



