. Smithsonian miscellaneous collections. specimens of Aedesaegypti the dorsal diverticula have the form of small, flat, elongatelobes with slender stalks (C) ; they diverge upward and outward fromthe oesophagus and lie against the anterior wall of the single ventral diverticulum is a large sack (A, vdv) extendingfrom a narrow neck far back into the ventral part of the diverticulum corresponds with the crop of other Diptera. Theventriculus, or stomach (A, Vent), for most of its length is a narrowtube. From the slightly enlarged anterior end, embraced by thesalivary g
. Smithsonian miscellaneous collections. specimens of Aedesaegypti the dorsal diverticula have the form of small, flat, elongatelobes with slender stalks (C) ; they diverge upward and outward fromthe oesophagus and lie against the anterior wall of the single ventral diverticulum is a large sack (A, vdv) extendingfrom a narrow neck far back into the ventral part of the diverticulum corresponds with the crop of other Diptera. Theventriculus, or stomach (A, Vent), for most of its length is a narrowtube. From the slightly enlarged anterior end, embraced by thesalivary glands, it extends upward and posteriorly in the 48 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. IO4 turns backward into the abdomen, and beyond the third segment ofthe latter expands into a large sack, the rounded posterior end ofwhich joins the enlarged anterior end of the intestine. The anteriorintestine is a short, slender tube (AInt) thrown into a small loopbefore it unites with the rectum {Red). The sacklike anterior part of. Fig. 19.—The alimentary canal and salivary glands of a mosquito, Aedesaegypti (L.) • A, outline of body and proboscis of a female, showing alimentary tract andsalivary glands, the left gland displaced laterally. B, the salivary glands. C,the oesophageal diverticula shown in relation to the oesophagus and ventriculus,ventral view. D, outline of the rectal sac, showing rectal papillae projectingfrom inner wall. AInt, anterior intestine; CbP, cibarial pump; ddv, dorsal diverticulum ofoesophagus; Hphy, hypopharynx; Lb, labium; Lm, labrum; Mai, Malpighiantubules; Oe, oesophagus; PhP, pharyngeal pump; Red, rectum; rp, rectalpapillae; SIDct, salivary duct; SlGld, salivary gland; SIP, salivary pump;vdv, ventral diverticulum of oesophagus (crop) ; Vent, ventriculus, or stomach. the rectum contains six small, soft, conical papillae projecting fromits inner wall (D, rp). These rectal papillae, characteristic of Dipteraand certain other insects, replac
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Keywords: ., bookauthorsm, bookcentury1800, bookdecade1860, booksubjectscience
