198 OrpErR—ANOPLURA. 
it was very difficult to determine the precise differences between some portions of the dorsal and ventral surfaces 
of the insects. They were sent to me by Giglioli as a new species of Nycteribia, but a slight examination con- 
vineed me they had no affinity with that genus beyond their apterous condition and bat-parasitism ; whilst a more 
careful investigation of them, 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 Hemi- 
ptera-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 pub- 
lished in the ‘ Journal of Microscopical Science,’ with small and quite unsatisfactory figures. 
Genus—POLYCTENES. Westw. MS. 
Antennz capite paullo longiores 4-articulate, articulo primo magno, supra versus basin angulato et seta 
longa instructo, apice antice setosa; articulis tribus ultimis longitudine et latitudine paullo decrescentibus, 
articulo tertio prope basin extus seta longa instructo; proboscis eapite brevior 3-articulata, articulo primo ad 
basin paullo dilatato ; setis, saltem duabus, internis; tarsi ad apicem interdum pulvillo spinuloso instruct. 
Species 1—POLYCTENES FUMARIUS. Westw. 
Prats XXXVIII. 
Clypeo rotundato ; antennis gracilioribus ; capite striolis duabus obliquis dorsalibus impressis, angulis posticis 
prominentibus ; prothorace transverso, lateribus parum rotundatis, utrinque seta longa ad angulum posticum ; 
elytris magis quadratis, angulis posticis setigeris; abdomine lateribus parallelis; pedibus elongatis setis longis 
instructis, unguibus tarsorum posticorum haud profunde incisis; pulvillo obsoleto ? 
Long. corp. lin. 2. 
Habitat parasitice in Molossum fumarium Jamaice (Gosse). In Mus. Hopeiano Oxoniz et Britann. 
Plate XXXVIII, fig. 1, Polyctes fumarius, upper 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 
antenne (the position of the inferior insertion of the basal joint being indicated by dots), the trabecule (?) 
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 longi- 
tudinal strie and the lateral spines of the elypeus; the proboscis, with two of its internal sete drawn out (one 
recurved, the other extending to the right side of the head); the basal and portion of the second joint of the 
antennze ; 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 iu situ, shewing the dilated base of the ungues in this pair of legs. 
Fig. 5. One of the fore legs seen obliquely. 
Fig. 6. One of the anterior tarsi seen in an oblique direction from the front. 
Fig. 7. The posterior tarsi. 
Specres 2—POLYCTENES MOLOSSUS. Westwood et Giglioli. 
Pirates XXXTX and XL! 
Clypeo rotundato ; antennis brevioribus crassioribus articulo primo spinoso; capitis angulis posticis minus 
porrectis; capite subtus ante basin proboscidis spinis, in duplici serie curvata, dispositis serieque transversa 
postica spinarum armato; trabecul spinis planis obtusis (pl. XX XIX, fig. H), singula in cavitate parva rotun- 
* All the details in plate XXXIX are taken from the top left-hand figure, lettered B, on that plate. The whole of 
the figures in plate XL are taken from the top right-hand figure of plate XXXIX, lettered A. All the figures were 
sketched with the camera lucida. 
