538 
MR. H. N. RIDLEY ON THE 
Differs from Gctnosoma attenuatum, Mayr ( c? ), in not being 
depressed, and (perhaps) in the long abdomen ; and from Tetra- 
gonaspis gracilicornis , Mayr ( 5 ), in the much shorter joints of 
the antennae. 
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 *' Jlavicollis , 
Mayr, but that species has two annuli (ring-joints) to the 
antennas. 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 antennae, 
and the terminal joints do not form a club, to say nothing of 
other differences. 
• 23. Evania lai vi gat a, Latr. 
Evania laevigata, Latr. Gen. Crust. Ins. iii. p. 251 (180/). 
A cosmopolitan species. The larvae 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 bimaculatds {Smith). 
Formica bimaculata, Smith, Cat. Hym. B. M. vi. p. 50, n. 171 (1858). 
Six specimens, all small workers. The species is new to the 
Museum collection. Smith described it from St. Vincent’s. 
Roger (Bei’l. ent. Zeitschr. vi. p. 285, 1862) identifies this species 
with Formica ruficeps , Eabr. (Syst. Piez. p. 404, n. 32) ; but I am 
not satisfied that this is correct, as Fabricius does not mention 
the conspicuous pale spiots on the second segment of the 
abdomen. In the small workers the head is mostly black ; 
* This genus proved 1o be the female of Ganosoma. 
