Famity—CETONIID. Sus-Faminy—CREMASTOCHEILIDES. 33 
Habitat ; Siam (Mouhot). In Mus. Britann., Oxonia et W. W. Saunders. 
I am reluctantly induced to place this Siamese insect in the Genus Pilinurgus, hitherto composed of species 
from Western Africa, with which it agrees in its obscure setose appearance, and in the structure of the 
maxille, which have a short porrected galea, obtuse at the tip, whilst the mando is also porrected and obtusely 
bidentate (pl. IX, fig. 3a). The mentum (fig. 37) is nearly square, with the fore margin slightly rounded ; the 
middle of the dise is somewhat angulated, with two large impressions in the anterior half, having a central raised 
ridge between them. The prosternum is armed with a deflexed flattened spine in front of the anterior coxz ; 
the abdomen beneath is convex; the pygidium is marked with two large oval depressions ; the metasternum is 
simple in front between the middle coxe. The length of the elytra is not quite equal to 1} times the width of 
the middle of the prothorax ; the punctures at the base of the elytra are large, but shallow, and wide apart. 
The species appears liable to be affected by grease, as some of the specimens which I have seen are quite obscure. 
Genus 18—TRICHOPLUS. 
(Burmeister, Handb. iii. p. 660, 1842; Gen. Ins. quad. No. 36.) 
Corpus oblongum planum, nigrum nitidum; caput latum in medio verticis nodulosum ; clypeus brevis 
transversus subsinuatus; antenne articulo primo maximo. Mandibule basi dilatate, dente molari angusto 
instructe, parte externa cornea apice obtuso. Maxille compress, galea magna cornea, basi curvata, bidentata ; 
mandonis dente longo gracili apice tridenticulato (fig. 10d). Mentum transversum fere planum, tenue, lateribus 
rotundato-dilatatis, parte antica subito angustiori, disco medio paullo concavo setoso. Prothorax magnus 
lateribus rotundatis. Elytra oblonga parallela, regione scutellari depressa. Pedes breves compressi. Tibixe 
omnes inermes. Tarsi omnes 3-articulati. Prosternum ante pedes anticos in spinam deflexam compressam 
apice dilatato-porrectum (fig. 107). Mesosternum carinatum obtusum, haud porrectum (fig. 9 a). 
The simple unarmed tibie, and the 3-jointed tarsi, at once distinguish this genus from the rest of the 
family. Hitherto the genus has only comprised one described species of remarkable character. A second, 
still more striking, was kindly communicated to me for this Monograph, from the Royal Museum of Stockholm, 
by the late Professor Boheman. 
Species 1 (54)—TRICHOPLUS LAVIS. 
Puate IX, Fie. 9. 
Depressus, totus niger nitidissimus; clypeo brevi sinuato; prothorace subquadrato, lateribus rotundatis 
antice paullo latioribus, subtiliter punctato, elytris oblique aciculatis punctatis, regione scutellari levissima ; 
pedibus valde compressis. 
Long. corp. lin. 5. 
Habitat ; Cape of Good Hope. 
Syn.: Cremast. levis. Gory et Perch. Mon. Cet. p. 115, pl. XVI, fig. 2 ; Burmeister, Handb. iii. p. 663; Gen. 
Ins. No. 36, fig. 1-8. 
My figure of this remarkable insect was drawn from M. Gory’s original type, communicated by Dr. 
Schaum. 
Species 2 (55)—TRICHOPLUS SCHAUMII. 
Prats IX, Fie. 10. 
Valde oblongus, elytris parallelis, niger nitidus; prothorace orbiculari, disco pronoti in cavitatem magnam 
rotundatam transverse striolatam excavato ; lateribus elevatis et postice rude punctatis; elytris oblique striatulis, 
singulo carina elevata longitudinali suture proxima et parallela instructo; pedibus omnibus inermibus ; calcari- 
bus tibiarum minutis, tarsis 3-articulatis brevissimis. 
Long. corp. lin. 5. 
Habitat; Cape of Good Hope. In Mus. Reg. Holm. 
Syy.:—Trichoplus Schaumii. West. MS; Schaum, Verz. Lam. Melit. p. 63. 
F 
