Vol. xxiii] ENTOMOLOGICAL NEWS. 339 



Second leg : Spines about equal to tibia in length, the latter one- 

 half the femur. Tarsus slightly shorter than tibia. Third legs: 

 Femur and tibia subequal and about four-fifths the tarsus. Metaxy- 

 phus short, acute. 



Length 6 mm., width across pronotum 1^2 mm. 



Described from three males and three females from Fort 

 Collins, Colorado, collected in May and June by Prof. C. P 

 Gillette to whom the author is indebted for the specimens. 

 Superficially the species resembles calva Say, with which it 

 possibly has been confused. It is considerably larger than 

 Say's species and structurally very different from any other 

 Corixid with which the writer is familiar. 



Explanation of Plate XVIII. 



A. Palmacorixa gillettii n. gen. et sp. Male with one hemielytron 

 removed to show the nature of the abdominal asymmetry, the 

 strigil (s), and the rudimentary metathoracic wing. Other specimens 

 show a rather more definite tegminal lineation. xi2. 



B. Male first leg (pala, tibia, and femur) showing the inner sur- 

 face of the pala with the stridulating pegs and the stridular area on 

 the femur. x5S. 



C. Female first leg (pala, tibia, and femur). xS5. 



Notes on Pediculus vestimenti Nietzsche, the Body 



Louse of Man. 



By A. A. GIRAULT, Brisbane, Queensland, Australia. 



The following fragmentary notes were derived from a visit 

 to the Cook County Hospital for the Indigent Insane at Dun- 

 ning, near Chicago, Illinois, and are published for their general 

 interest. 



Dr. F. B. Clarke, formerly medical superintendent of the 

 hospital, and Mr. J. J. Davis, my colleague in economic ento- 

 mology, were experimenting tentatively on fumigants with the 

 object of finding one which was efficient both as an insecticide 

 and germicide or disinfectant in order to obviate separate fumi- 

 gations of entering patients' clothes. The common body louse 

 was one of the insects used in the experiments and some eggs 

 of this insect forming the contral lot of one of the experiments 



