92 
Mr. J. O. Westwood's Descriptions of 
tained a knowledge subsequent to the printing of my Monograph, 
and was therefore compelled to introduce a description of it by 
way of postscript. The plate accompanying my Monograph 
being at that time engraved, I was prevented from adding a 
figure of it. I have, therefore, now supplied the deficiency, 
adding numerous structural details, being convinced that so re- 
markable an object cannot fail to interest the Entomologist. 
Plate 10, fig. 4, represents the insect magnified. 4 a. The head beneath. 4 b. 
The mandible. 4 c. The maxilla. 4 d. The labrum and labial palpi. 4 e. 
The antenna sideways. 4 f. The antenna seen from the front. 4 g. The pos- 
terior leg. 
Platyrhopalus angustus, Westw. Plate X. fig. 6. 
P. brunneo-castaneus, elytris angustioribus, singulo macula 
magna laterali, triangulari, nigrd ; antennarum clava magna 
rotundata, subconvexa, externe versus basin incisa, dente 
acuto. 
Long. corp. lin. 3 ; latitudo elytrorum, lin. 1 . 
Habitat in India Orientali. Neemuck. Dom. Downes. 
Corpus totum nitidum, parce pubescens, brunneo-castaneum, sub- 
convexum. Caput mediocre, antice vix emarginatum, linea 
longitudinali impressa verticem fere attingente ; oculi magni, 
prominuli, laterales, nigri. Antennae articulo basali depresso, 
parte interna magis producta, apice obliquo ; clava thoracis 
magnitudine, margine omni acuto, supra et subtus subcon- 
vexa, fere rotundata, externe incisione lata et profunda 
versus basin, dente basali acuto. Thorax capite paullo latior, 
lateribus antice rotundatis, postice paullo angustior (sc. 
cordato-truncatus), impressione tenui transversa pone me- 
dium. Elytra thorace dimidio latiora, angulis humeralibus 
prominentibus, rotundatis, tuberculo ordinario ad angulum 
externum posticum ; brunneo-castanea, singulo macula magna 
triangulari nigra versus medium, suturam fere attingente. Ab- 
domen apice nigro, subtus 4-articulatum, articulo basali 
maximo, Sndoet 3tio brevibus. Pedes castanei ; tibiis rnedio- 
criter dilatatis, apice oblique truncatis. Tarsi articulis basa- 
libus late spongiosis. 
This species was collected in the interior of India at Neemuck 
by Assistant Surgeon E. T. Downes, to whom I beg leave to 
present my thanks for an opportunity of describing and figuring 
so valuable an addition to this singular but very rare group of 
insects. He informs me that he caught a single specimen in his 
room at night by lamp-light, having observed it crawling on his 
