er 
32 Mr. M‘Lachlan’s Notes on 
In both sexes the apical portion of the abdomen is 
wholly bronzy black. In the male the 10th segment 
above has a deep triangular excision; superior append- 
ages rather shorter than the 10th segment, black, 
flattened, and triangular, broad at the base, but the 
apex produced into a slender acute point; inferior ap- 
pendages scarcely longer, stout, curved upward and 
inward, yellowish externally, the apex subacute. In the 
female the margin of the 10th segment is excised as in 
the male; the appendages are slightly shorter than the 
seement, black, conical, and subacute. 
The size varies as follows:—Length of abdomen, 
male, 56—61 mm.; female, 61—63 mm. Length of pos- 
terior wing, male, 44—52 mm.; female, 45—52 mm. 
Expanse, male, 86—111 mm.; female, 97—109 mm. 
The locality for the original examples, both male and 
female, should be Rio Napo, Ecuador (not ‘‘ East Peru” 
as stated). 
Anomisma should probably head the Légion Pseudo- 
stigma. 
Microstigma rotundatum, Selys, race exustwm, Selys. 
Very common; varying much in size. 
Mecistogaster Jocaste, Hagen, race sincerus, M‘Lach. 
One female (Cf. Ent. Month. Mag., vol. xiv., p. 88). 
The female previously alluded to as from ‘‘ East Peru (?)” 
is really from the Rio Napo. Ihave not yet seen the 
male, which would probably decide the question as to 
whether sincerus should be considered a ‘‘race”’ of Jocaste 
or a distinct species. It should be noticed that in sin- 
cerus the humeral line is double, the two lines having 
their origin in an opposed sense (a vestige of the upper 
line is to be seen in Jocaste). In the examples from 
Pebas and the Rio Napo both lines are nearly complete; 
in that from the Rio Bobonaza the upper line is scarcely 
more than one-third the length of the lower (the latter 
being complete). ' 
Mecistogaster Buckleyi, n. s. 
Wings hyaline; reticulation of both pairs scarcely 
complicated at the extremity. Pterostigma of the an- 
terior consisting of 5—7 cellules in the costal area only. 
Posterior without pterostigma. 
