162 B. p. UVAROV. 



3 (4) Pronotum with the median keel straight in profile ; hind margin rotundato- 



angulate ph- migratoria, L. 



4 (3) Pronotum with the median keel concave in profile ; hind margin widely 



rounded . . . . . . . • • • ph- migratorioides, Rch. & Fmi. 



Synonymic Notes. 



The synonymy of L. migratoria ph. migratoria, L., and L. migratoria ph. danica, L., 

 is quite correctly given by W. F. Kirby in his Catalogue (iii, pp. 229, 230), apart from 

 the fact that he distinguishes them as two different species, and I think it unnecessary 

 to repeat it here. To the synonyms of danica, however, must be added Pachytylus 

 australis, Sauss. (Prodr. Oedip., pp. 119, 120, no. 5, 1884), but not Locusta australis, 

 Froggatt (Agric. Gaz., N.S. Wales, xiv, p. 110, 1903), which represents Gastrimargus 

 musictis, F., as has already been stated by Prof. Y. Sjostedt (Ark. Zool., xii, no. 20, 

 p. 11, 1920). 



Pachytylus capita, Sauss. (Prodr. Oedip., pp. 119, 120, no. 4, 1884) is undoubtedly 

 identical with L. migratoria ph. migratorioides (Rch. & Frm.). 



Pachytylus minor, Sauss. (Abh. Senck. Naturf. Ges., xxi, p. 631, 1899) belongs to the 

 genus Pternoscirta, as I am able to state from an examination of good photographs 

 of the type specimen most obligingly taken for me by Dr. J. Carl, of the Geneva 

 Museum. 



The only remaining species of Locusta in Kirby's Catalogue is L. pardalina 

 Walk., conspecific with sulcicollis, Stal, and capensis, Sauss., which is here made 

 the type of the new genus Locustana, m. 



A Description of the Genus Locustana, nov. (figs. 5, 6 B & 8). 



Antennae distinctly compressed dorso-ventrally. Frontal ridge in profile straight 

 or feebly concave, distinctly widened and impressed around the median ocellus, 

 flat elsewhere, with the margins very obtuse, disappearing just below the ocellus. 

 Fastigium of the vertex slightly sloping, forming a straight widely rounded angle 

 with the frontal ridge, flat, distinctly longer than broad, with the margins distinctly 

 raised, convex, with the median keel always developed ; the distance between the 

 eyes slightly less than twice as broad as the frontal ridge between the bases of the 

 antennae. Eyes oval, with the fore margin almost straight ; their width in the 

 broadest part, which is in the middle, is equal to about half their maximal height. 

 Pronotum with the prozona constricted, deeply furrowed, convex between the 

 furrows ; the typical furrow cuts the median keel distinctly behind the middle ; 

 median keel moderately elevated ; lateral lobes with the hind angle widely rounded. 

 Mesosternal lobes distinctly broader than long, their inner angles widely rounded ; 

 mesosternal interspace subquadrate in the female and slightly longer than broad in 

 the male. Elytra hyaline throughout, except the basal parts of the marginal and 

 basal areas, which are coriaceous ; rather broad and short, not more than four to 

 five times as long as their maximal width ; apex oblique ; hind radial vein strongly 

 diverging from the middle radial long before its bifurcation (halfway between the 

 base and the bifurcation) ; discoidal area almost as long as half the elytra, with a 

 sinuate or straight false vein ; inter-ulnar area about as broad as the discoidal, or 

 scarcely broader, sparsely areolated, with two rows of the areolets separated by a 

 rather regular false vein ; axiflar vein free, in most cases reaching the hind margm. 

 Wings rather short, not more than twice as long as their greatest width. Hmd 

 femora rather broad— less than four times as long as their maximal width ; upper 

 keel not serrate ; upper carina of the externo-median area distinctly convex. 



(^.—Supra-anal plate, with strongly chitinized margins, trapezoidal, distinctly 

 longer than the basal width ; its surface distinctly concave, with several small chitinous 

 tubercles in the basal half, forming a trapezium ; outer margins nearly straight ; 



