﻿2 
  Mr. 
  Adam 
  White's 
  Description 
  

  

  is 
  linear-oblong, 
  and 
  the 
  joints 
  of 
  the 
  tarsi 
  are 
  three 
  in 
  number— 
  the 
  

   species 
  is 
  T. 
  clavicornis 
  — 
  the 
  thorax 
  is 
  of 
  a 
  shining 
  blue, 
  and 
  the 
  

   elytra 
  are 
  green 
  ; 
  the 
  thorax 
  and 
  abdomen 
  beneath 
  are 
  blueish, 
  

   washed 
  with 
  red. 
  The 
  genus 
  Ldnguria 
  was 
  established 
  by 
  La- 
  

   treille 
  in 
  1802, 
  in 
  the 
  Hist. 
  Nat. 
  des 
  Insectes, 
  the 
  type 
  being 
  L. 
  

   bicolor, 
  a 
  North 
  American 
  species 
  first 
  described 
  by 
  Fabricius 
  as 
  

   a 
  Trogoska. 
  The 
  following 
  brief 
  description 
  may 
  serve 
  to 
  make 
  

   known 
  the 
  chief 
  external 
  characters 
  of 
  the 
  sub-genus 
  

  

  DOUBLEDAYA. 
  

  

  Head 
  decumbent, 
  in 
  front 
  at 
  the 
  base 
  of 
  the 
  jaws 
  expanded 
  

   and 
  wider 
  than 
  the 
  thorax 
  (fig. 
  3). 
  Antennae 
  moderate, 
  with 
  a 
  

   longish 
  club 
  of 
  four 
  rather 
  than 
  five 
  joints. 
  Eyes 
  small, 
  prominent, 
  

   but 
  not 
  projecting. 
  Thorax 
  as 
  wide 
  as 
  long, 
  margined 
  on 
  the 
  sides, 
  

   bisinuate 
  at 
  the 
  base, 
  grooved 
  down 
  the 
  middle. 
  Elytra 
  elon- 
  

   gated, 
  sides 
  nearly 
  parallel, 
  slightly 
  margined, 
  the 
  margin 
  tliick- 
  

   ened 
  at 
  the 
  apex, 
  which 
  is 
  abrupt. 
  Legs 
  very 
  long, 
  the 
  two 
  first 
  

   pairs 
  somewhat 
  the 
  longest, 
  the 
  femora 
  and 
  tibiae 
  compressed. 
  

   Tarsi 
  very 
  wide, 
  dilated, 
  flat, 
  all 
  the 
  joints 
  wider 
  than 
  long; 
  basal 
  

   joint 
  shortly 
  cordate, 
  second 
  joint 
  transverse, 
  slightly 
  cordate, 
  third 
  

   joint 
  smallest, 
  slightly 
  cordate. 
  The 
  tarsi 
  of 
  first 
  pair 
  of 
  legs 
  the 
  

   largest 
  (fig. 
  4), 
  those 
  of 
  the 
  third 
  pair 
  not 
  half 
  so 
  wide; 
  the 
  sides 
  

   of 
  the 
  feet 
  covered 
  with 
  short, 
  uniform, 
  dense 
  hairs, 
  arranged 
  in 
  

   transverse 
  lines. 
  

  

  Languria 
  (Doubledaya) 
  Viator 
  (Fig. 
  1,2). 
  

  

  This 
  insect 
  is 
  a 
  native 
  of 
  Madras, 
  in 
  the 
  East 
  Indies; 
  the 
  spe- 
  

   cimen 
  described 
  is 
  unique, 
  in 
  the 
  collection 
  of 
  the 
  East 
  India 
  

  

  