. Contributions from the Department of Zoology and Entomology. Zoology; Entomology; Insects. 212 IOWA ACADEMY OP SCIENCES. the water in which they live, and in this remain protected and from it extend themselves to obtain food. The food is for the most part apparently minute aquatic organisms, algse, etc. Their presence might be considered a means of clearing water of such matter did they not at times become so numerous as to prove an element of danger. _^xa=ip=E=i=i=i=i:^. Fig. 12. (C;iironom«8 sp.) o, larva, dorsal view. 7), side view, c, head and first seg- ments of body, d, terminal segmen
. Contributions from the Department of Zoology and Entomology. Zoology; Entomology; Insects. 212 IOWA ACADEMY OP SCIENCES. the water in which they live, and in this remain protected and from it extend themselves to obtain food. The food is for the most part apparently minute aquatic organisms, algse, etc. Their presence might be considered a means of clearing water of such matter did they not at times become so numerous as to prove an element of danger. _^xa=ip=E=i=i=i=i:^. Fig. 12. (C;iironom«8 sp.) o, larva, dorsal view. 7), side view, c, head and first seg- ments of body, d, terminal segments of body sliowiug appendages, e, upper surface of head. /, lower surface of head, cr, side, h, dorsal. ?, ventral view of pupa. (Orig- inal, drawn by Miss King.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Iowa State University. Dept. of Zoology and Entomology. Des Moines : F. R. Conway
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