INSECT FAUNA OF HUMAN EXCREMENT 555 



INSECTS OTHER THAN FLIES WHICH WE HAVE FOUND ON 

 HUMAN EXCREMENT. 



As already pointed out, the beetles breeding in or attracted 

 to human excrement have comparatively little significance in the 

 transfer of disease. They are distinctly outdoor species and 

 are seldom found away from excrement. The same may prac- 

 tically be said of the Hymenopterous insects which we have 

 found. The parasitic forms are parasites of the maggots of 

 the Diptera breeding in such excrement and the other forms 

 are attracted to it only while fresh and containing more or less 

 moisture. They are seeking the foul-smelling moisture and 

 nothing more. None of them are household insects. 



Insects collected on o?- fotmd breeding in Human Excrement 

 during the sufniner of i8g^. 



Coleoptera. 



Carabid^e. 

 Amara musculus Say (accidental). 

 Stenolophus conjunctus Say (accidental). 



Hydrophilid^. 

 Cercyon ocellatus Say. 

 Cercyon hEemorrhoidalis Fabr. 



SlLPHID^. 



Silpha noveboracensis Forst. 



Staphylinid^e. 

 Homalota sp. 



Aleochara bimaculata Grav. (predaceous). 

 " nitida Grav. " 



" n. sp. <' 



Trichiusa robustula Cas. 



Microglossa sp. 



Hoplandria lateralis Melsh. 



Quedius capucinus Grav. (predaceous). 



Staphylinus maculosus Grav. " 



