﻿270 
  Mr. 
  R. 
  C. 
  L. 
  Perkins 
  on 
  

  

  Group 
  of 
  species 
  with 
  white 
  clypeus 
  in 
  

  

  the 
  (^, 
  with 
  NITIDIUSCULA. 
  

  

  A. 
  lahialis 
  K., 
  humilis 
  Imh., 
  coitana 
  K., 
  tar 
  sola 
  Nyl. 
  

   (analis), 
  hattorfiana 
  F., 
  marginata 
  F. 
  (cetii), 
  chrysosceles 
  K., 
  

   nitidiuscula 
  Sch. 
  {hicens), 
  cingulata 
  F. 
  

  

  Group 
  of 
  A. 
  NAiTA. 
  

  

  -4. 
  nana 
  K. 
  (nee 
  Sm. 
  Saund.), 
  alfkenella 
  Perk. 
  var. 
  

   moricella 
  Perk., 
  alfkenella 
  Perk,, 
  spreta 
  Perez, 
  sanndersella 
  

   Perk, 
  {nana), 
  falsifica 
  Perk., 
  nanula 
  Nyl., 
  minutuloides 
  

   Perk. 
  var. 
  parvuloides 
  Perk., 
  minutuloides 
  Perk., 
  minutula 
  

   K. 
  var. 
  parvula 
  K., 
  minutula 
  K., 
  subopaca 
  Nyl., 
  proxima 
  K. 
  

  

  Group 
  of 
  A. 
  WILKELLA. 
  

  

  ^. 
  ovatula 
  K. 
  (afzeliella), 
  wilhella 
  K., 
  similis 
  Sm., 
  

   dor 
  sola 
  K. 
  

  

  The 
  group 
  of 
  species 
  with 
  a 
  white 
  or 
  yellow 
  clypeus 
  in 
  

   the 
  (^ 
  is 
  composite, 
  but 
  need 
  not 
  on 
  that 
  account 
  be 
  re- 
  

   jected 
  in 
  dealing 
  with 
  our 
  small 
  fauna. 
  Otherwise 
  the 
  

   groups 
  are 
  natural, 
  though 
  they 
  would, 
  of 
  course, 
  require 
  

   modifications 
  in 
  their 
  definition 
  if 
  a 
  world, 
  or 
  even 
  European 
  

   fauna 
  were 
  under 
  consideration, 
  and 
  also 
  subdivision 
  

   would 
  be 
  necessary. 
  Even 
  as 
  they 
  are 
  here 
  defined, 
  

   many 
  foreign 
  species 
  and 
  some 
  even 
  from 
  such 
  distant 
  

   localities 
  as 
  California 
  or 
  the 
  Far 
  East 
  can 
  be 
  readily 
  

   placed. 
  

  

  The 
  species 
  of 
  Nomada 
  might 
  be 
  arranged 
  as 
  follows 
  :■ 
  — 
  

  

  N. 
  germanica 
  Panz. 
  (ferruginata), 
  argentata 
  H.-Sch. 
  

   (atrata), 
  armata 
  H.-Sch., 
  guttulata 
  Sch., 
  obtusifrons 
  Nyl., 
  

   tormentillae 
  Alfk. 
  (roberjeotiana), 
  rufipes 
  F. 
  (solidaginis), 
  

   flavopicta 
  K. 
  {jacobaeae), 
  sexfasciata 
  Panz., 
  fucata 
  Panz., 
  

   goodeniana 
  K. 
  (succincta), 
  lathburiana 
  K., 
  marshamella 
  K. 
  

   (alternata), 
  lineola 
  Panz., 
  bifida 
  Thoms., 
  baccata 
  Sm. 
  {albo- 
  

   guttata), 
  hillana 
  K., 
  xanthosticta 
  K. 
  (lateralis), 
  leucophthalma 
  

   K. 
  {borealis), 
  bucephalae 
  Perk., 
  signata 
  Panz., 
  flava 
  Panz. 
  

   (ruficornis 
  part.), 
  ruficornis 
  L., 
  fabriciana 
  L., 
  conjungens 
  

   H.-Sch., 
  flavoguttata 
  K., 
  furva 
  Panz. 
  

  

  Group 
  of 
  A. 
  TIBIALIS. 
  

  

  A 
  distinct 
  and 
  well-marked 
  group 
  characterised 
  by 
  the 
  

   strong 
  rugosities 
  of 
  the 
  anterior 
  area 
  of 
  the 
  propodeum, 
  

   this 
  area 
  posteriorly, 
  where 
  it 
  becomes 
  decUvous, 
  always 
  

   bounded 
  or 
  closed 
  by 
  a 
  raised 
  line 
  or 
  transverse 
  rugosity. 
  

  

  