72 Mr. W. F. Kiiby's 



37. Gastrimargus acutangulm. 



Fachvti/lvs {(Eilaleus) acutangu/us, Stal, Rec. Ortli., i, 

 Vl25 (1873). , 



Rah. Transvaal: F vetoria'^ (Distant) Caffrauia(,SV«/). 



Mr. Distant's collection contains a single damaged speci- 

 men of this beautiful species, without precise locality. It 

 is quite distinct from the species which Saussure describes 

 under the same name ; for Still's species has blue wings, 

 and Saussure's yellow wings. As Stal's description is 

 short, and Saussure's applies to another species, I add 

 here a full description of Mr. Distant's specimen. 



Long. Corp. 40 millim. ; long. pron. 10 luillini. : lat. pron. 8 niillini. 



Female. Intermediate between G. (Jeterminntus, Walker, and G. 

 marmoratus, Tlnmb., ]:)iit nearer to the former. Ground colour test- 

 aceous ; the central and lateral carinse of the vertex very slightly 

 indicated, but visible ; a double black line before and beliind each 

 eye ; a brown streak, commencing in a point, just above the central 

 ocellus, on the frontal ridge ; and a .slightly-indicated brown line 

 bordering the sides of the ridge on the outside ; lower orbits, 

 mandibles, and an oblique stripe on the cheeks from the upper 

 surface of the mandibles, black. Antenna', except two pale basal 

 joints, wanting. Pronotum granulated, with the central carina 

 considerably raised, and the hinder angle long and acute, as in 

 G. chitenninafus ; central carina pale yellow, narrowly bordered on 

 the sides with blackish, the upper stripe from the eye continued 

 to the first sulcus, and followed by another black stripe, tapering at 

 each extremity ; the lower line from the eye expands into a black 

 triangle, scarcely continued beyond the principal sulcus, and sur- 

 rounded by yellowisli, which takes the form of an angulated strijie 

 al)ove it, and an irregular band below, from the first sulcus to the 

 hind margin of the pronotum. Below it is another triangular black 

 .spot, extending from the fore border of the pronotum to the principal 

 sulcus, and marked behind at the lower angle by a yellow spot. 

 Abdomen shining black above, and testaceous below, and on tlie 

 sides, which exhibit a double row of black dots. Legs rufo-testaceous ; 

 hind femora spotted with black on all the carinte ; the inside black, 

 Avith light blue transverse bands; hind tibioe and tarsi red, the 

 spines of the tibiaj yellowish, and tijjped with black. Tegmina 

 brown towards the base, the costal area varied with yellowish 

 subhyaline ; the anal area darker yellowish aliove, and brown at the 

 base and below ; the intermediate basal area brown, varied by a 



