﻿THE 
  ANNALS 
  

  

  AND 
  

  

  MAGAZINE 
  OF 
  NATURAL 
  HISTOEY. 
  

  

  [EIGHTH 
  SERIES,] 
  

  

  No. 
  75. 
  MABCH 
  1914. 
  

  

  XXX. 
  — 
  Descriptions 
  and 
  Records 
  of 
  Bees. 
  — 
  LVII. 
  

   By 
  T. 
  D. 
  A. 
  CocKERELL, 
  University 
  of 
  Colorado. 
  

  

  Mesotrichia 
  hakeriana, 
  sp, 
  n. 
  

  

  ? 
  . 
  — 
  Length 
  about 
  20 
  mm., 
  anterior 
  wing 
  18^. 
  

  

  Robust, 
  black, 
  with 
  black 
  hair, 
  that 
  on 
  face 
  inconspicu- 
  

   ously 
  mixed 
  with 
  greyish 
  white, 
  that 
  on 
  cheeks 
  wholly 
  black 
  

   except 
  a 
  few 
  pale 
  hairs 
  behind 
  lower 
  part 
  of 
  eyes. 
  Wings 
  

   very 
  dark 
  fuliginous, 
  with 
  golden-green 
  and 
  purple 
  tints. 
  

   Very 
  close 
  to 
  M. 
  amauroptera 
  {Xylocopa 
  amauroptera, 
  Perez), 
  

   but 
  differing 
  in 
  the 
  venation, 
  the 
  lower 
  side 
  of 
  the 
  second 
  

   s.ra. 
  being 
  much 
  more 
  than 
  twice 
  as 
  long 
  as 
  the 
  upper 
  and 
  

   little 
  shorter 
  than 
  the 
  lower 
  side 
  of 
  the 
  first. 
  Also, 
  the 
  tibial 
  

   scale 
  or 
  process 
  (large 
  in 
  amauroptera) 
  is 
  poorly 
  developed, 
  

   a 
  slender 
  carina 
  ending 
  in 
  an 
  inconspicuous 
  lamina. 
  The 
  

   tarsi 
  are 
  not 
  reddish 
  brown 
  apically 
  as 
  in 
  amauroptera, 
  and 
  

   the 
  hair 
  on 
  their 
  inner 
  side 
  is 
  wholly 
  black. 
  

  

  Compared 
  with 
  M. 
  bomhiformis 
  (Xylocopa 
  bombiformis, 
  

   Sm.) 
  our 
  insect 
  is 
  distinguished 
  by 
  the 
  well-punctured 
  cheeks 
  

   and 
  the 
  extremely 
  dark 
  wings. 
  

  

  Bab. 
  Los 
  Banos, 
  Philippine 
  Is. 
  (C. 
  F. 
  Baker, 
  1786). 
  

  

  Nomia 
  nevadensis, 
  Cress 
  on. 
  

   Grossmont, 
  near 
  San 
  Diego, 
  California 
  (C. 
  H. 
  Richardson) 
  . 
  

  

  Triepeolus 
  cressonii, 
  Robertson. 
  

  

  Quanah, 
  Indian 
  Territory, 
  on 
  Helianthus, 
  June 
  10, 
  1906 
  

   {J. 
  D. 
  Mitchell). 
  

  

  Ann, 
  (& 
  May. 
  N. 
  Hist, 
  Ser. 
  8, 
  ]'ol. 
  xiii. 
  19 
  

  

  