166 Psyche [October 



The following table will aid in separating the species : 



1 . Antennse yellow, base of each segment black hebes 



Antennae, except basal segments, brown 2 



2. Lateral appendages of the ninth sternite (below the pleural appendages) 



without a lower pendulous or claw-like arm madera 



Lateral appendages with a lower pendulous or claw-like arm 3 



3. Lateral appendages with only two arms 4 



Lateral appendages with three arms 6 



4. Lower arm of lateral appendage slender; membranous, nearly straight. . fallax 

 Lower arm of lateral appendage more strongly chitinized, claw-like, tip 



blackish 5 



5. Lower arm of lateral appendages short, broad, flat rohweri 



Lower arm of lateral appendages long, slender grata 



6. The two upper arms of lateral appendages consisting of two small subequal, 



spine-like processes coloradensis 



First and second arms of lateral appendages very different in size and shape ... 7 



7. The blade-like processes arising from the posterior margin of the ninth 



sternite long, slender, sinuous alia 



The blade-like processes shorter, more triangular newcomeri 



PSEUDOSCORPIONS IN ANT NESTS. 



By William Morton Wheeler, 

 Bussey Institution, Harvard University. 



The sporadic occurrence of pseudoscorpions, especially of species 

 of Chelifer and Chernes, in ant nests has been reported by several 

 authors. Haldemann^ seems to have been the first to note this 

 occurrence in America. Wasmann^ states that species of the genus 

 Chelifer are not uncommon in ant nests, "but apparently only as 

 occasional inquilines." He also says that he received from Mr. 

 Pergande specimens of Chelifer that had been taken in nests of 

 the American Aphoenogaster fulva. Banks^ describes several 

 pseudoscorpions taken by Brues in the nests of Texan ants, 

 namely Chelanops unicolor with Eciton coecum and Pachycondyla 



'On the Occurrence of Cremastocheiliis and other Insects in Ant Nests, and of Chelifer found Parasitic under 

 the Elytra of Alaus oculatus. Amer. Journ. Sci. Arts (2) VI, 1848, pp. 148-149; Ann. Mag. Nat. Hist., 1848, 

 pp. 221-222. 



^Kritisches Verzeichniss der mvTmekophiien und termitophilcn .\rthroiioden. Berlin, Felix L. Dames, 

 1894, p. 193. 



3The Pseudoscorpions of Texas. Bull. Wis. Nat. Hist. Soc, VI, 1908, pp. 39-42. 



