Volume 1

A monograph of the Culicidae, or mosquitoes : mainly compiled from the collections received at the British museum from various parts of the world in connection with the investigation into the cause of malaria conducted by the Colonial office and the Royal society / by Fred. V. Theobald.

  • Theobald, Frederick V. (Frederick Vincent), 1868-1930.
Date:
1901-1910
Catalogue details

Licence: Public Domain Mark

Credit: A monograph of the Culicidae, or mosquitoes : mainly compiled from the collections received at the British museum from various parts of the world in connection with the investigation into the cause of malaria conducted by the Colonial office and the Royal society / by Fred. V. Theobald. Source: Wellcome Collection.

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    a suture a portion of the mesothorax called the scutellum (sc). The scutellum is usually trilobed, a central and two lateral lobes (Cutex, ifcc.), but in Corethra it consists of a single piece only; its posterior border is always provided with a row of large and some small bristles—the “ posterior border bristles ”—which are in some cases of specific value in regard to their number- on the mid lobe ; there are also numerous bristles on the lateral lobes ; this portion of the mid-body is more or less covered with scales; the metanotum (Fig. 6) is the smooth, very convex, nude, back portion of the thorax, large and distinct in Culex and Anopheles, but more or less hidden under the mesothorax in Megarhinus* ; in one genus, Wyeomyia (Fig. 6, II.), it carries a few chaetae, and in Trichoprosopon (III.), scales as well as cliaetae. Idre sides or pleurae can also be seen to be composed of three chief parts, each marked by the coxae of the three pairs of sc sc sc Types of metanotum. I. Culex. II. Wyeomyia. III. Trichoprosopon. se = scutellum. legs. There is present in front of the fore coxa an oval scale which covers the prothoracic spiracle, not easily seen however ; another spiracle exists on the mesothorax in front of the origin of the wings ; I have never seen the metathoracic spiracle, but it is said to exist ; the mesopleura is the space between the fore and mid coxae which carries the fore wing, the mid leg, and a spiracle ; the metcipleura lies behind, and carries a hind leg and haltere. (3.) The abdomen is more slender than the thorax, and is narrower and more pilose in the J than in the 9 • It consists of nine segments ; each segment is composed of a dorsal plate or tergum, and a ventral plate or sternum, * Usually spelt Megliarinn. The name originally given by Desvoidy is spelt Megarhinus. The former had previously been used for some of the Tip ul i due.