﻿66 
  GUY 
  A. 
  K. 
  MARSHALL. 
  

  

  Coelosternus 
  granicollis, 
  Pierce 
  (1916). 
  

  

  Mr. 
  G. 
  Bondar 
  states 
  that 
  this 
  species 
  attacks 
  the 
  stems 
  of 
  cassava 
  (Manihot 
  

   utilissima) 
  at 
  Bahia 
  in 
  Brazil. 
  The 
  species 
  was 
  described 
  (with 
  a 
  good 
  figure) 
  from 
  

   four 
  specimens 
  found 
  alive 
  in 
  quarantine 
  in 
  Washington, 
  D.C., 
  in 
  cassava 
  stems 
  

   from 
  an 
  unspecified 
  locality 
  in 
  Brazil. 
  

  

  Mr. 
  Pierce 
  uses 
  the 
  generic 
  name 
  Leiomerus, 
  Boh., 
  for 
  his 
  species, 
  rejecting 
  

   Coelosternus, 
  Schh., 
  on 
  the 
  ground 
  that 
  the 
  name 
  was 
  preoccupied 
  by 
  Sahlberg. 
  It 
  

   is 
  true 
  that 
  the 
  latter 
  author 
  described 
  a 
  species 
  of 
  Coelosternus 
  shortly 
  before 
  Schon- 
  

   herr's 
  " 
  Dispositio 
  methodica 
  " 
  appeared, 
  for, 
  as 
  he 
  clearly 
  explains, 
  he 
  considered 
  

   it 
  desirable 
  to 
  follow 
  Schonherr's 
  new 
  classification 
  (with 
  which 
  he 
  was 
  obviously 
  

   acquainted) 
  even 
  though 
  it 
  had 
  not 
  actually 
  been 
  published 
  ; 
  and 
  moreover 
  he 
  takes 
  

   care 
  to 
  cite 
  Schonherr 
  as 
  the 
  author 
  of 
  the 
  name 
  of 
  his 
  insect. 
  Sahlberg 
  did 
  not 
  

   describe 
  the 
  genus 
  Coelosternus, 
  nor 
  did 
  he 
  cite 
  a 
  type, 
  and 
  there 
  can 
  be 
  no 
  scientific 
  

   justification 
  for 
  using 
  the 
  name 
  otherwise 
  than 
  in 
  the 
  sense 
  clearly 
  defined 
  by 
  Schonherr. 
  

   Further, 
  the 
  name 
  Leiomerus 
  was 
  not 
  established 
  by 
  Boheman, 
  but 
  was 
  a 
  MS. 
  name 
  

   of 
  Chevrolat's 
  which 
  Schonherr 
  rejected, 
  merely 
  quoting 
  it 
  in 
  the 
  synonymy 
  of 
  Coelo- 
  

   sternus 
  glabrirostris. 
  The 
  name 
  should 
  therefore 
  be 
  attributed 
  to 
  Pierce 
  and 
  sinks 
  

   as 
  a 
  synonym 
  of 
  Coelosternus, 
  Schh. 
  

  

  Subfamily 
  Zygopinae. 
  

   Piazurus 
  papayanus, 
  sp. 
  nov. 
  (Plate 
  i, 
  fig. 
  2). 
  

  

  $ 
  $. 
  Integument 
  black 
  or 
  piceous 
  black, 
  rather 
  thinly 
  clothed 
  with 
  brown 
  and 
  

   grey 
  setiform 
  scaling, 
  the 
  elytra 
  with 
  a 
  few 
  small 
  indefinite 
  patches 
  of 
  suberect 
  black 
  

   scales 
  principally 
  on 
  intervals 
  2-4 
  ; 
  the 
  lower 
  surface 
  with 
  more 
  sparse 
  pale 
  setiform 
  

   scales. 
  

  

  Head 
  with 
  a 
  few 
  coarse 
  punctures 
  on 
  the 
  vertex 
  and 
  a 
  line 
  of 
  single 
  scales 
  between 
  

   the 
  eyes. 
  Rostrum 
  strongly 
  narrowed 
  from 
  the 
  base 
  to 
  the 
  middle 
  and 
  thence 
  very 
  

   slightly 
  widening 
  to 
  the 
  apex 
  ; 
  the 
  basal 
  third 
  very 
  convex 
  transversely, 
  closely 
  

   and 
  strongly 
  punctate, 
  and 
  with 
  a 
  low 
  median 
  ridge 
  ; 
  the 
  distal 
  portion 
  more 
  flattened 
  

   dorso-ventrally 
  and 
  very 
  minutely 
  and 
  sparsely 
  punctate. 
  Antennae 
  red-brown 
  ; 
  

   joint 
  2 
  of 
  the 
  funicle 
  nearly 
  twice 
  as 
  long 
  as 
  1, 
  3 
  equal 
  to 
  4, 
  and 
  5, 
  6 
  and 
  7 
  bead-like. 
  

   Prothorax 
  conical, 
  a 
  little 
  shorter 
  than 
  its 
  basal 
  width, 
  the 
  sides 
  straight 
  and 
  not 
  

   constricted 
  anteriorly 
  ; 
  the 
  basal 
  margin 
  strongly 
  bisinuate 
  and 
  its 
  median 
  lobe 
  

   shallowly 
  sinuate 
  ; 
  the 
  dorsum 
  with 
  a 
  very 
  high 
  tubercular 
  elevation 
  on 
  the 
  

   median 
  line 
  in 
  front 
  of 
  the 
  middle 
  (PI. 
  i, 
  fig. 
  2, 
  a) 
  and 
  a 
  very 
  faint 
  median 
  costa 
  

   running 
  from 
  it 
  to 
  the 
  base 
  ; 
  the 
  dorsal 
  sculpture 
  mainly 
  hidden 
  by 
  the 
  scaling, 
  but 
  

   consisting 
  of 
  unevenly 
  distributed 
  minute 
  punctures, 
  which 
  are 
  denser 
  towards 
  the 
  

   sides, 
  and 
  a 
  few 
  much 
  larger 
  punctures, 
  which 
  are 
  mostly 
  confined 
  to 
  the 
  anterior 
  

   half 
  and 
  especially 
  on 
  the 
  slopes 
  of 
  the 
  prominence 
  ; 
  the 
  supracoxal 
  carina 
  distinct. 
  

   Scutellum 
  ovate, 
  with 
  minute 
  shallow 
  punctation 
  and 
  very 
  short 
  setae. 
  Elytra 
  ovate, 
  

   broadly 
  rounded 
  behind, 
  with 
  the 
  shoulders 
  prominent, 
  and 
  the 
  dorsal 
  outline 
  

   strongly 
  convex; 
  the 
  deep 
  striae 
  containing 
  large 
  punctures 
  which 
  gradually 
  

   become 
  evanescent 
  behind, 
  the 
  septa 
  between 
  them 
  often 
  subgranular, 
  and 
  each 
  

   puncture 
  with 
  a 
  horizontal 
  setiform 
  scale 
  projecting 
  from 
  its 
  anterior 
  edge 
  ; 
  the 
  

   intervals 
  rather 
  broader 
  than 
  the 
  striae, 
  with 
  numerous 
  very 
  closely 
  placed 
  and 
  

   usuallv 
  transverse 
  granules, 
  which 
  become 
  smaller 
  behind 
  but 
  are 
  absent 
  on 
  the 
  

   basal 
  half 
  of 
  intervals 
  7-9, 
  and 
  a 
  very 
  low 
  transverse 
  elevation 
  not 
  far 
  from 
  the 
  base 
  

   on 
  intervals 
  2-4 
  ; 
  each 
  interval 
  with 
  a 
  single 
  row 
  of 
  short 
  recumbent 
  setae, 
  which 
  

   are 
  not 
  easily 
  distinguished 
  from 
  the 
  scaling. 
  Legs 
  finely 
  punctate 
  and 
  rather 
  thinly 
  

   clothed 
  with 
  pale 
  narrow 
  scales 
  ; 
  the 
  anterior 
  pairs 
  of 
  femora 
  not 
  toothed 
  ; 
  the 
  

   hind 
  tibiae 
  without 
  an 
  ante-apical 
  spine 
  on 
  the 
  inner 
  edge. 
  Venter 
  with 
  a 
  large 
  

   n-shaped 
  impression 
  in 
  the 
  middle 
  of 
  the 
  first 
  visible 
  ventrite. 
  

  

  Length, 
  9 
  ■ 
  5-10 
  -25 
  mm. 
  ; 
  breadth, 
  4-75-6 
  mm. 
  

  

  Brazil 
  : 
  Bahia 
  (G. 
  Bondar). 
  

  

  Described 
  from 
  four 
  specimens. 
  

  

  