538 MR. 11. K. RIDLEY ON THE 



Ditt'ers from Ganosoma attenuatum, Mayr (cJ), iunot being 

 depressed, and (perhajis) in the long abdomen ; and from Tetra- 

 gonaspis gracilicornis, Mayr ( $ ), in the much shorter joints of 

 the antennge. 



Female. Long. corp. 2 millim. ; ovipositor 4^ millim. 



Tawny-yellow, with a slight greenish-coppery reflexion (colours 

 perhaps altered by spirit) ; antennae 12-jointed, serrated and set 

 with very short hairs ; brown, except the two basal joints ; 

 scape as long as the three following joints, second joint rather 

 longer than the fourth, third (annulus) very small, fifth and 

 following gradually smaller, the last three joints forming a club ; 

 ovipositor more than twice as long as the body ; veins of the 

 wings of nearly uniform thickness ; ulna as long as the ptero- 

 stigma, hardly curved or thickened, metacarpus about as long as 

 the radius. Head and thorax finely rugose. Legs yellow, the 

 femora slightly thickened. 



Appears to approach most nearly Tetragonaspis* JlavicolUs, 

 Mayr, but that species has two aunuli (ring- joints) to the 

 antennae. Except in the structure of the antennae, the single 

 specimen before me much resembles the figure of T. gracilicornis, 

 Mayr, but the latter species has longer hairs on the antenna?, 

 and the terminal joints do not form a club, to say nothing of 

 other differences. 



23. EvAJsriA LAEVIGATA, Liitr. 



Evania laevigata, Latr. Gen. Crust. Ins. iii. p. 251 (ISO/). 



A cosmopolitan species. The larva; of this genus are parasitic 

 in the egg-capsules of Blattidae. 



A single specimen taken in a house at Sambaquichaba. It is 

 very common in Pernambuco. 



24. Camponotus bimaculatus {Smith). 



Formica bimaculata, Smith, Cat. Hym. B. M. vi. p. 50, u. 171 (1^58). 



Six specimens, all small workers. The species is new to the 

 Museum collection. Smith described it from St. Vincent's. 

 Eoger (Berl. ent. Zeitschr. vi. p. 285, 1862) identifies this species 

 with Formica ru/lceps, Pabr. (Syst. Piez. p. 404, n. 32) ; but I am 

 not satisfied that this is correct, as Fabricius does not mention 

 the conspicuous pale spots on the second segment of the 

 abdomen. In the small workers the head is mostly black; 

 * This genus proved to be tlie female of Ganosoma. 



