Document Type

Peer-Review Article


Feculae have been used for some years in the study of insect food-habits and biology. Among the past authors who have used them are Frost (1928), Hodson and Brooks (1956), and Morris (1942), who discussed the use of feculae and frass in the identification of insect species in general; Boldyrev (1928), who figured the feculae of the bradyporine katydid Bradyporus multituberculatus; Brown (1937), who described in detail fecular microstructure in the spine-breasted grasshopper Melanoplus bivittatus; Weiss and Boyd (1 950. 1 952), who figured the feculae of representatives of selected insect orders; Gangwere (1 962). who described the various factors responsible for shaping and coloring feculae, and with Morales (Gangwere and Morales, 1964) erected the first formal classification of orthopteroid feculae, and later (Gangwere, 1969) discussed the use of feculae of museum specimens as a shortcut method for determining food-habit; Scott (1964), who constructed a pictorial key to the droppings of cockroaches; Simeone (1964), who described the frass of posting beetles; Bhatia and Chandra (1967), who discussed the effect of food plants on the color, structure, and size of feculae in the locust Schistocerca gregaria; and Sardesai (1 969) who reported on size variation in feculae of larval Lepidoptera.

With the partial exception of Gangwere and Morales (1964) and Bhatia and Chandra (!967), investigators have paid scant attention to variations in fecular structure within given species. The present study fills, in part, this gap in our knowledge. It describes those differences in fecular size and structure in selected Michigan acridids that relate to sex of defecator and type of food. It also attempts a statistical measurement of such differences.

Included in

Entomology Commons



To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.