﻿Coleopterous 
  Genus 
  3Iegacephala. 
  bl 
  

  

  of 
  the 
  family 
  published 
  in 
  the 
  first 
  volume 
  of 
  the 
  Memoirs 
  of 
  the 
  

   Natural 
  History 
  Society 
  of 
  Liege. 
  A 
  careful 
  examination 
  of 
  the 
  

   characters 
  of 
  the 
  MegacepJuilce 
  has 
  convinced 
  me 
  that 
  a 
  more 
  

   extensive 
  division 
  is 
  requisite 
  ; 
  in 
  other 
  words, 
  that 
  the 
  characters 
  

   employed 
  to 
  separate 
  Tetracha 
  and 
  Anaira 
  will 
  render 
  the 
  esta- 
  

   blishment 
  of 
  several 
  other 
  sections 
  necessary 
  when 
  applied 
  to 
  the 
  

   Old 
  World 
  as 
  well 
  as 
  to 
  the 
  pale 
  species 
  of 
  the 
  New 
  World. 
  

  

  M 
  

  

  EGACEPHALA. 
  

  

  A. 
  Elytra 
  humeris 
  rotundatis, 
  baud 
  angulato-prominentibus. 
  

  

  * 
  Corpus 
  apterum, 
  subcylindricum. 
  Mandibulse 
  dentibus 
  

   acutis. 
  Color 
  viridi-metallicus, 
  elytris 
  totis 
  concoloribus. 
  

   (^Aptema, 
  Serv, 
  and 
  St. 
  Farg.) 
  Type 
  M. 
  Senegalensis, 
  

   Latr., 
  Dej.; 
  Cic. 
  inegalocephala, 
  Fahr. 
  (Senegal.) 
  

  

  ** 
  Corpus 
  alatum, 
  latins, 
  subdepressum. 
  

  

  a. 
  Mandibiilae 
  dentibus 
  intermediis 
  oblique 
  truncatis. 
  

   Color 
  metallicus, 
  elytris 
  ad 
  apicem 
  macula 
  lutea 
  

   notatis. 
  Types 
  M. 
  4!-signata, 
  Dej. 
  (Senegal) 
  ; 
  M. 
  

   Bocandei, 
  Guerin-Meneville, 
  Rev. 
  Zool. 
  (Congo.) 
  

  

  b. 
  Mandibulae 
  dentibus 
  intermediis 
  acutis, 
  sinistra 
  

   dente 
  2ndo 
  (apice 
  acuto 
  mandibulae 
  pro 
  dente 
  Imo 
  

   computato) 
  parvo 
  vel 
  3tio 
  minori. 
  Color 
  luteus. 
  

   {Ammos'ia, 
  Westw.) 
  Type 
  M. 
  bifasctata, 
  Brulle 
  

   {yEquinoctialis, 
  Dej.) 
  (Amer. 
  merid.) 
  

  

  B. 
  Elytra 
  humeris 
  angulato-prominentibus. 
  

  

  * 
  Mandibula 
  recta, 
  dentibus 
  tribus 
  apicalibus 
  armata 
  

   (dente 
  basali 
  composito 
  denticuloque 
  ejus 
  supero 
  baud 
  

   computatis). 
  

  

  •f 
  Mandibula 
  sinistra 
  dente 
  2ndo 
  minuto. 
  Color 
  me- 
  

   tallicus, 
  elytrorum 
  apice 
  macula 
  lutea 
  notato. 
  Type 
  

   M. 
  Euphratica, 
  Oliv., 
  Dej. 
  (Persia, 
  India, 
  Spain, 
  

   Barbary.) 
  

  

  j"|- 
  Mandibula 
  sinistra 
  dente 
  3tio 
  fere 
  obsoleto. 
  Color 
  

  

  totus 
  niger. 
  (Anaira, 
  Hope.) 
  Type 
  M. 
  sepul- 
  

  

  chralis, 
  Fabr., 
  Dej. 
  Sp. 
  Gen. 
  v. 
  199 
  (M, 
  variolosa, 
  

  

  Dej. 
  Sp. 
  Gen. 
  i. 
  p. 
  14) 
  (Amer. 
  merid.) 
  

  

  ** 
  Mandibula 
  recta 
  dentibus 
  quatuor 
  apicahbus 
  armata. 
  

  

  Color 
  metallicus, 
  elytris 
  macula 
  lutea 
  apicali 
  notatis.* 
  

  

  • 
  Obs. 
  — 
  The 
  pale 
  apical 
  spot 
  of 
  the 
  elytra 
  is 
  wanting 
  in 
  M. 
  virginica, 
  Fab., 
  

   M. 
  femoralis, 
  Perly 
  — 
  and 
  a 
  few 
  others. 
  

  

  