Cannula I. Bolivar , 1906

Popov †, George B., Fishpool, Lincoln D. C. & Rowell, C. Hugh F., 2019, A review of the Acridinae s. str. (Orthoptera: Acridoidea: Acrididae) of eastern Africa with taxonomic changes and description of new taxa, Journal of Orthoptera Research 28 (2), pp. 37-105 : 40-41

Cannula I. Bolivar, 1906

Cannula I. Bolívar, 1906: 394. Nom. nov. for Calamus Saussure, 1861.

Type species.

- Calamus linearis Saussure, 1861 by original designation.

Description.

-As in key to genera. Size variable from medium to large, sexual dimorphism marked. Body very elongate, slender, straw-like. Antenna ensiform, strongly compressed, shorter than head and pronotum together. Head very elongate, narrow, conical. Fastigium of vertex more than twice length of basal part of head, with parabolic apex. Frontal ridge in upper half strongly, lamelliformly compressed, gradually widening in lower half. Pronotum short with well-developed medial carina and straight, parallel, lat eral carinae with strong longitudinal ridges between them. Two sulci crossing dorsum; metazona shorter than prozona with roundly excurved posterior margin. Mesosternal interspace closed. Tegmina well developed with dense venation and reticulation; wings shorter, sometimes much shorter. Hind femur very narrow, not reaching end of abdomen; external upper lobe of hind knee strongly elongate; lower lobes moderately elongate, of equal length. Male supra-anal and subgenital plates elongate, acutely angular; cerci short, conical. Epiphallus with narrow bridge, moderately large ancorae and very large lobiform lophi (Fig. 13). Ovipositor unspecialized.

Discussion.

-The systematics of this genus are in a confused state. Numerous species have been described, but the majority was subsequently synonymized under the senior synonym Cannula gracilis (Burmeister, 1838). Roy (2003) described a new West African species from Mt. Nimba ( Cannula vestigialis Roy, 2003). The only species recorded in East Africa is Cannula gracilis . This differs from the other common species, C. karschi (Kirby, 1910), not to date recorded in East Africa, in its slenderer build and in having shortened hind-wings.