1 9 8 O N D E R — A N O P L U R A . F A M I L Y — P O L Y C T E N I D I E . 199
it was very difficult to dctorinine tlie precise differences between some portions of tlie dorsal and ventral surfaces
of tlie insects. They were sent to me by Giglioli as a new species of Nycteribia, but a sliglit examination convinced
me tliey had no affinity witli tliat genus beyond tlieir apterous condition and bat-parasitism ; whilst a more
careful investigation of tliem, and of a closely allied species captured upon another species of Molossus bats in
the West Indies, shewed that they possessed a haustellum very similar in form to that of the genuine liemiptera
Heteroptera. From the rows of strong flat spines with which they are armed, I proposed the generic name
of Polyetenes, which Sig. Giglioli adopted in his short description of this and some other parasitic insects published
in the ' Journal of Microscopical Science,' with small and quite unsatisfactory figures.
G E N U S — P O L Y C T E N E S . Westw. MS.
Antenna? capite paullo longiores 4-articulatiE, articnlo primo magno, supra versus basin angulato et seta
longa instructo, apice antice setosa; articulis tribus ultimis longitudine et latitudine paullo deerescentibus,
articulo tertio prope basin extus seta longa instructo; proboscis capite brevior 3-articnlata, articulo primo ad
basin paullo dilatato; setis, saltem duabns, internis ; tarsi ad apieem interdum pnlvillo spimiloso instrueti.
SPECIES 1—POLTCTEJiES FMIAKIUS. Westw.
PLATE 5X5VIII.
Cljipeo rotundato ; antennis gracilioribus; capite striolis duabns obhqnis dorsalibus impressis, angulis posticis
prominentibus; prothorace transverse, lateribus parum rotundatis, ntrinque seta longa ad angnlum posticum;
elyh-is magis quadratis, angulis posticis setigeris; abdomine lateribus parallelis; pedibus elongatis setis longis
instruetis, imguibns tarsorum posticorom hand profunde incisis ; pulvillo obsolete ?
Long. corp. lin. 2.
Habitat parasitiee in Molossmn fnma-mm JamaicEe (Gosse). In Mus. Hopeiano OxonisE et Britann.
Plate XXX~\T:II, fig. 1, Fohjctes fumarius, npper side.
Fig. 2. The same, under side.
Fig. 3. The front of the head seen from above, shewing the large semilunate clypeus(?) the base of the
antermsB (the position of the inferior insertion of the basal joint being inchoated by dots), the trabeculaB (?)
seen from above, the two deep dorsal converging impressions and the insertion of the proboscis on the under
side.
Fig. 4. The under side of the head and basal portion of the prosternum, shewing the very delicate longitudinal
stria; and the lateral spines of the clypeus ; the proboscis, with two of its internal setaj drawn out (one
recurved, the other extending to the right side of the head) •, the basal and portion of the second joint of the
antenna!; the trabecula (?) with its row of broad flattened spines on the fore margin, and its row of finer spines
on its hind margin; portion of the patch of strong spines in the middle of the front of the prosternum, with
the extremity of the two fore legs in situ, shewing the dilated base of the ungues in this pair of legs.
Fig. 5. One of the fore legs seen obhquely.
Fig. 6. One of the anterior tarsi seen in an obliqne direction from the front.
Fig. 7. The posterior tarsi.
SPBOIES 2—POLYCTENES MOLOSSUS. Westwood et Giglioli.
PLATES X X X I X and XL.'
Clypeo rotundato; antennis brevioribus crassioribus articulo primo spinoso; capitis angulis posticis mmus
pon-ectis; capite snbtns ante basin proboscidis spinis, in duplici serie curvata, dispositis serieque transversa
postica spinanrm armato; trabeeulaj spinis planis obtusis (pi. XXXIX, fig. II), singula in cavitate parva rotun-
1 All the details in plate XXXIX are taken from tlie top left-hand figui-e, lettered B, on that plate. Tlie whole of
the figures in plate XL are taken from the top right-hand figure of plato XXXIX, lettered A. All the figures were
sketched with the camera lucida.
data inserta, fig. G); prothorace fere rotundato; dorsi margine postico serie transversa spinarum armato ; pedibus
brevioribus et crassioribus; abdomine pone medium paullo dilatatum; elytris (?) in mare (?) magis rotundatis
quam in individiio stylum apicalem gerente.
Long. corp. fere lin. 2.
Habitat parasitiee in Molossnm CIdneusem (Giglioli).
Plate XXXIX, fig. B, Folyctenes Molossus male (?).
Fig. B* represents the head seen from beneath, shewing the lunate clypens (?) the double cm-ved row of spines
in front of the proboscis, the two antenna, and the two trabeculai, the lower row of spines of which is bent inwards
towards the proboscis; the three-jointed proboscis, shewing an oval portion at the base, which seems to represent
the labrum and two of the elongated internal seta;. Also the transverse row of spines along- the posterior
margin of the head, with two strong spines at the outer angle.
Fig. A, one of the thick fore legs, in which the tarsal joints appear soldered together, probably owing to
the dilatation of the outer covering by the growth of the inclosed limb. Fig. B exhibits the tarsus of one of
the fore legs, and fig. C the extremity of the tarsus of the other fore leg: in both figures are to be seen, within
the terminal joint, the ungues of an inclosed tarsus, shewing that the specimen was about to cast its skin', and consequently
proving that the species undergoes the metamorphosis climidiata, with either a complete or semicomplete
pupa.
Fig. D represents one of the fom- posterior tarsi, shewing the pulvillus as well as the ungues of a different
form to those of the fore leg, one being simple and shghtly bent, whilst the other is very deeply notched.
Fig. E represents the extremity of the same tarsus, shewing the ungues and pulvillus of the inclosed limb.
Fig. F shews one of the spines of the lateral margin of the clypeus, with the cup-like tubercle in which it
is inserted.
Fig. G, the cup of one of the flattened spines (fig. H) of the anterior margin of the trabecula.
Plate XXXIX, fig. A, represents the other sex, having a larger body and a curved horny appendage at its
extremity beneath.
Plate XL, fig. A, represents the under side of the head and prothorax, with the fore legs (the apical half of
the tibiie and tarsi cut off). In this figure the transverse row of comb-like spines (29 in number on the posterior
margin of the head), and the similar row with 49 spines, are represented, having been rendered visible by
the treatment with Canada balsam in which the specimen was immersed. The deheate transverse striatnre of
the clypeus, the partial withdrawal of one of the seta; of the mouth from the proboscis at as well as that of
three of the seta; from the longitudinal opening of the proboscis towards its apex, and the two strong pairs of
muscles for the movement of the fore leg, are shewn. In this sex (as seen also in pi. XXXVIII, fig. 4) the
lower row of spines of the trabecula; is not developed into a comb as in the opposite sex.
Fig. D shews the anterior tibia and tarsus, the triarticulation of the latter being more distinctly shewn than
in the other specimen.
Fig. E, one of the four posterior tarsi, shewing the lobed base extending to the tip of the first joint.
Fig. C, three of the spines of the upper margin of the trabecula.
Fig. B, the extremity of the body seen beneath, shewing a transverse oval lobe with two setose jnipiUiB and
the strong curved horny appendage (ovipositor ?).
' The question here naturally arises whether, upon the next shedding of the skin, indicated hy the already perfect
state of the distal extremities of the mdosed limbs, the dorsal scales resemhlhig elytra would be fm-ther developed either
iuto elytra or hcmelytra!
If
i I.- : I j ' !