. Sanitary entomology; the entomology of disease, hygiene and sanitation. Fig. 23.—Larva of Stomoxys calcitrans: enlarged sketch of thoracic spiracles. (Greene.) decaying matter, and is not often passed by people, but there is onerecord. Horse manure, cow manure, and warm, decaying vegetation, likeold straw and grass heaps, are common breeding Fig. 24.—Larva of Stomoxys calcitrans: enlarged sketch of right stigmal plate. Theseplates are one and one-half times their breadth apart. (Greene.) Muscina stabulans Fallen Head of larva (fig. 25) divided into two parts from above, no dis-tinct
. Sanitary entomology; the entomology of disease, hygiene and sanitation. Fig. 23.—Larva of Stomoxys calcitrans: enlarged sketch of thoracic spiracles. (Greene.) decaying matter, and is not often passed by people, but there is onerecord. Horse manure, cow manure, and warm, decaying vegetation, likeold straw and grass heaps, are common breeding Fig. 24.—Larva of Stomoxys calcitrans: enlarged sketch of right stigmal plate. Theseplates are one and one-half times their breadth apart. (Greene.) Muscina stabulans Fallen Head of larva (fig. 25) divided into two parts from above, no dis-tinct papilla; two great hooks close together; anterior spiracles withabout six lobes (fig. 25b). The surface of the segments is mostly with the fifth segment, on the under side, there is a basal,transverse, swollen area, furnished on the crest with rows of teeth; eachof tliese areas is divided on the median line. On the next to the lastsegment there is a similar area at the tip, but not divided. The seg-ments below also show a transverse line before the middle. The lastsegment has the anal basal area with spines, but not very prominent,and bears a median and three lateral tubercles with spines. The tubercles COMMON FLIES AND HOW TO TELL THEM APART 147 are nearly in a transverse row. The rounded tip of the body (fig. 25c)shows, ac
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbenefic, bookyear1921
