as) LONGICORNIA. 
1. Aplagiognathus spinosus. _ 
Cnemoplites spinosus, Newman, Charlesw. Mag. N. H. iv. p. 194. . 
Aplagiognathus spinosus, Thoms. Class. Long. p. 320; Physis, i. p. 90. 
Hab. Muxico, near the capital (Flohr). 
2. Aplagiognathus hybostoma. 
& A. spinoso proxime affinis, sed differt mandibularum tubere altiore et lateraliter compresso. Paullo minor, 
oblongo-linearis, castaneo-fuscus, capite et mandibulis rufo-hirtis, his intus acute tridentatis, dentibus 1-2 
medianis contiguis ; thorace creberrime punctulato, plagis tribus discoidalibus lineisque brevibus exterioribus 
levibus sparsim grosse punctatis; lateribus fere ut in A. spinoso acute multispinosis ; elytris coriaceis et 
punctulatis, vage sulcatis, apice singulatim fortiter rotundatis, ad suturam breviter spinosis. 
Long. 1 poll. 6 lin. og. 
Hab. Guatemata, Calderas, Duefias (Champion). 
Closely allied to .A. spinosus, but well distinguished by the different form of the 
tuber on the upper surface of the mandibles, which in A. spinosus is broad and convex 
in front and on the sides, and in the new species is a high compressed elevation, concave 
on its exterior face. It is also a smaller and rather narrower insect; but the colour 
and sculpture are very similar. Two examples only have been sent by Mr. Champion. 
3. Aplagiognathus serratus. 
Avlagiognathus serratus, Thoms. Syst. Ceramb. p. 578. 
Hab. Mexico. 
Unknown to me. 
NOTHOPLEURUS. 
Nothopleurus, Lac. Gen. des Col. viii. p. 125. 
The following are the only known species :— 
1. Nothopleurus ebeninus. 
Nothopleurus ebeninus, Lac. loc. cit. 
Hab. Yucatan. 
2. Nothopleurus gnatho. | 
Mallodon gnatho, White, Cat. Col. Long. B. M. i. p. 45. 
Hab. Honpvuras (Dyson). 
Mr. C. O. Waterhouse has discovered that this species belongs to the genus Notho- 
pleurus. 
MALLODON. 
Mallodon, Serv. Ann. Soc. Ent. Fr. 1832, p. 176. 
Thirty-six species of this genus are enumerated in the Munich catalogue; some, 
however, have evidently been erroneously referred to it; and others are synonyms. 
Notwithstanding these deductions, the genus will remain a large one. Its head 
