78 



Mrinoirs of tlir Inditni MiinriiiH. 



[Vol MI. 



Protomocoflus rrHcmitlfs iMbiriitm in Iniving the latonil unci intornietlintp area 

 nn'tastornuin fuM'tl. though .so far as I know tho i-lytra are never unito.| Init it ha- the 

 ilentition re<hue<l, es|»e<ially on the left si«le. It is prohahly allie<l tn tlie a.Hyninietriial 

 forinH of J/rtj(/«Wn7»M through the more primitive npccies of Labiemu (i.e., tritjonnphonts 

 niul inaequaU») I ut tloe.s not apjjear to be allied to the higher fornts of the hitter 

 genus. 



(itmatim with whirh tlie iniperfectly sej)arate(l (hutijnrius (? and Taliiis of whith I have 

 not seen a specimen) n»av he iiniinl .il~i« tt-uds to have the ilentition rt-diK <•<!. i-imi i.,ll\ 

 on the left Hide 



pgriiJ ' /> and rfirfy/ziMo I. II Ml t tie last line of descent from Mn^h., inm- {>.i<it.]. 



They are Miperlicialiv that it seenis best to retain both genera in the absence of 



other forms throwing light upon them. Concerning their relationship wee Gravely, 19140, 

 pp. 328-329. 



The genera of MacnJininae may now be redefined thus : — 

 The Hiipntorbitiil unci supra-cx-oiiMtal ti(l':'-> ilift<-c»ntiniicnis ; 

 iii!icct«< always •cyinnietrirnl ; the mi. turn nlways with 

 I<rintar>- but without secondary scars • • Mncntliniis, p. 8 >. 



The supni-orbitAJ aiul supni occipital mij'- ..•..; muous, the 

 latter MJinetinics pn>ducc<l outwards iKdiiiul the former in 

 uxMiiiiictrical species without scars of any kind on the 

 iiii'iilunt . . . . . • • • • • • • 2. 



The nientun) without scars : the outer side «>( the mandibles 



angulate at the base or not at all 

 The mentum with scars ; or. the outer side of the mandibles 



an)^ilate opim-ite the anterior lower tcM)th 

 Onlv three lamellae recopii/jihle when the antenna is furled ; tli' 



mentum strongly uroovetl in the middh' line from front to l>ark Pieuranus, p. M. 

 Mon» than three Umcllae recognizalile when tin- antenna is 

 furled ; the mentum at moat with an incomplete median 

 groove anteriorly 

 The inner tuljercles separated by a .space J-J as long as that 



seimrating the outer tubercles 

 The inner tuljercles separated by a space §-1 times as long ns 

 that sepftrating the out<?r tubercli's 

 /'The left outertul»ercleacuteandlittleornolar>;<'r than the right . 

 or. much Urger and cur\-cd inwards, with its extremity rounded 

 rather than truncate and never ungulir on the cniter side in 

 fn»nt. The dentition compW-te in symmetrical species; the 

 lowest terminal tooth always present on Inith sides ; the 

 J right anterior lower t<K)th smaller than the left in the more 

 ^ higblv asrmmetrical species. The side* of the elytra hairleas. 

 The loft outer tubercle larger than the right, directed mc»ro or le.ts 

 inwitnU. fnicieAt*- di«t«lly. the outer anijle of truncation dis- 

 tinct, (on >r le».H (orwanlly din'cted ap<v\ to the tu- 

 bercle ; or, • the el\-tra hair\-. The dentition complete. 

 ^^ or both the lowest terminal and anterior lower teeth reduced 



3. 



Tiberioides, p. 84. 



Ep**ithrnu«, p. 85. 



