221 
though there were several unimpregnated females in the box: how 
is this to be accounted for? The males invariably emerge from the 
chrysalis between 5 and 7 in the afternoon; but I have only, as yet, 
reared fourteen males and about two dozen females out of upwards of 
100 cases ; I begin to fear the remainder must be dead.” 
The accompanying figure of the female of the British species was 
made from the living insect, specimens having been sent me from 
Scotland by Mr. Weaver in the middle of the month of June. The 
body has all the soft appearance of that of the larva of a wasp or bee, 
and is of a pale dirty whitish colour, except the upper side of the 
head and thoracic segments, which are brown; the first, fourth, fifth, 
sixth, seventh, eighth, ninth, tenth and eleventh segments of the 
body are furnished at the sides with a pair of spiracles, from which 
the trachez may be seen to radiate through the thin skin of the 
body ; on the underside of the body is a row of nine small brown 
spots in the middle of the segments, commencing on the segment 
next to the head, those on the thoracic segments being close together 
between the minute rudiments of legs. The head has three deep 
circular impressions in front, forming a triangle ; the eyes appear to 
be merely irregular black spots, with the surface continuous and desti- 
tute of facets; the antennz are rudimental, consisting of a minute 
exarticulated pair of appendages on the underside of the front of the 
head ; between the rudimental antenne there is a transverse impres- 
sion in the place of the mouth which is alternately puffed out and 
withdrawn, but no opening is visible; the legs are minute tubercles; 
the body is terminated by a small fleshy lobe or appendage, beneath 
which is a fleshy pro-leg or wart. The insect has a very strong 
vermicular motion, contracting segment after segment, considerably 
resembling in this respect the incipient pupa of some Hymenop- 
tera. It twists the extremity of its body about in various directions, 
especially upwards, with considerable energy. 
The winged male has the antenne bipectinated to the tips; the 
anterior legs are long and slender, the tibia being furnished with a 
long and slender spur arising from near the base, and the forewings 
are only furnished with eleven branches running to the margin of the 
wing. From a comparison of the figure of this wing with those of 
O. Saundersii (Pl. XXXV. fig. 2) and O. Hiibneri (Pl. XXXVI. 
fig. 16), it appears evident that the wanting branch is that analogous 
to the upper discoidal of Mr. Edward Doubleday. 
The figures given by the Rev. L. Guilding of his two West Indian 
species of Otketicus being deficient, from containing no representa- 
tion of the veining of the wings, the structure of the legs, &c., I 
have endeavoured to supply these deficiencies by an examination of 
typical specimens, which are in fact requisite to enable us to esta- 
blish satisfactory comparisons with the new species described in this 
paper. 
Orxeticus Kirsu. (Plate XXXIV. fig. 2 and details.) 
Of the male of O. Kirbii, L. G., there is a typical specimen in the 
Kirbian cabinet of the Entomological Society, which has afforded the 
