the CoUo'ptcrous family Passalidx. 467 



same way, so that the existence of forms less sombre-hued 

 than the generahty need no longer be doubted. 



The genus Lcptaulax has been restricted by Zang to the 

 large species in which there is a well-defined cephalic horn 

 and lateral appendages behind completely separated from 

 the supra-orbital elevations. Tliey may generally be dis- 

 tinguished also by the four clypeal teeth being in a straight 

 line at their tips and by the absence of hair from the 

 depressed parts of the head. Lcptaulacidcs comprises nearly 

 all the remaining Oriental species of the family having 

 only three leaflets in the antennal club and contains all 

 the smallest representatives of the family. 



Although similarly coloured to L. glctbcr, Kirsch.jZcjotot- 

 lacides ptdclielhis is very distinct. It is smaller and less 

 flattened, with much shorter leaflets to the antennae 

 and the inner teeth of the clypeus more advanced. 

 The shoulders of the elytra are less pointed, and the 

 hinder border of the red band is a little indented at 

 the suture, whereas in L. (jlalier it is slightly produced at 

 that point. 



Chilomazus horccdis, sp. n. 



Robustiis, coiivexus, capite nigoso, antice late et arcuatim excavato, 

 angulis acute productis, sinistro perpaulo longiore, cornu mediano 

 parum elevats, lato, carinis posterioribus confuso, carinis anterioribus 

 angulum acutum includentibus, brevissimis, ante tuberculos evane- 

 scentibus, his fortibus, approximatis, inter se et cum dentibus clype- 

 alibus connexis, prothorace sat longo, parum transverse, imjiunctato, 

 stria mediana vix perspicua foveaque laterale rugosula ; scutello 

 postice Isevi ; elytris fortiter striatis, striis dorsalibus baud, laterali- 

 bus vix punctatis, elytris postice paulo ampliatis, apice leviter acu- 

 minatis, humeris nudis ; mesosterno polito, foveis nitidis, metasterni 

 medio bi-impresso, lateiibus rugoso-punctatis, hirsutis ; antennarum 

 lamellis tribus ultimis longibus, duabus prsecedentibus brevibus. 



Long. 37 mm. 



Hah. Assam, Naga Hills (Doherty). 



I have seen only a single specimen of this aberrant 

 species, which has many of the characteristics of Tiberius, 

 but is excluded from that genus by the existence of a large 

 well-defined tubercle on the anterior part of the mentum. 

 The head is only very slightly assymetrical. The median 

 horn and the two anterior tubercles are placed very close 

 together and enclose an equilateral triangle. The club of 



TRANS. ENT. SOC. LOND. 1906. — PART IV. (jAN. 1907) 31 



