﻿WEEVILS 
  OF 
  THE 
  TRIBE 
  OPHRYASTINI 
  — 
  DAVIS 
  531 
  

  

  biiqucrquo 
  (H. 
  Soltau) 
  ; 
  Magdiilena 
  (Stricklor), 
  Texas, 
  Alpine 
  

   (Wickhuiii); 
  Marfa 
  (Wickliain). 
  Utah, 
  Dividend 
  (Ton\ 
  Spauldinj]:) 
  ; 
  

   Anu'rican 
  Fork 
  (lliihhurd 
  and 
  Sclnvarz). 
  Colorado 
  (Popcnoo). 
  

   Montana, 
  llek'na. 
  Idaho, 
  Pocatello 
  (Wickham). 
  

  

  [From 
  a 
  note 
  which 
  Davis 
  had 
  pinnod 
  into 
  the 
  National 
  Museum 
  

   coUection 
  it 
  appears 
  tliat 
  certain 
  specimens 
  from 
  the 
  localities 
  listed 
  

   above 
  are 
  those 
  which 
  he 
  had 
  placed 
  as 
  sulcirostris 
  with 
  considerable 
  

   confidence. 
  In 
  addition 
  the 
  Museum 
  collection 
  contains 
  a 
  fjood 
  many 
  

   specimens 
  that 
  Davis 
  had 
  examined 
  and 
  set 
  aside 
  as 
  either 
  sulcirostris 
  

   (Say) 
  or 
  porosits 
  LeConte, 
  but 
  which 
  he 
  had 
  not 
  yet 
  placed 
  more 
  

   defmitely. 
  These 
  specimens, 
  which 
  can 
  be 
  considered 
  to 
  belonn; 
  to 
  a 
  

   sulcirostris-porosjis 
  complex, 
  arc 
  from 
  the 
  following 
  places: 
  Texas, 
  

   Marfa; 
  Sweetwater; 
  Big 
  Springs. 
  New 
  Mexico, 
  Luna; 
  Torrance 
  

   County; 
  Albuquerque; 
  Koehler; 
  near 
  Koehler. 
  Arizon'a, 
  Peach 
  

   Springs; 
  Winslow; 
  "Palm 
  Spg." 
  Kansas 
  and 
  western 
  Kansas. 
  

   Colorado, 
  Canon 
  Cit}'^; 
  Custer 
  County; 
  Bent 
  County; 
  Denver; 
  

   Colorado 
  Springs; 
  La 
  Junta; 
  Fort 
  Collins; 
  Graham's 
  Park. 
  Utah, 
  

   Salt 
  Lake. 
  Wyoming, 
  Cheyenne. 
  Idaho, 
  Ilagerman. 
  Montana, 
  

   Helena; 
  P^nid; 
  Miles 
  City; 
  "Assinbne." 
  North 
  Dakota, 
  Bismarck. 
  

   Canada, 
  Medicine 
  Ilat, 
  Alberta.] 
  

  

  OPHEYASTES 
  POHOSUS 
  LcConte 
  

  

  Figure 
  69 
  

  

  Ophryastes 
  porosus 
  LeConte, 
  1854, 
  p. 
  225. 
  

  

  The 
  description 
  of 
  0. 
  sulcirostris 
  (Say) 
  applies 
  equally 
  well 
  to 
  

   tliis 
  species. 
  The 
  two 
  species, 
  although 
  separable 
  on 
  genitalic 
  

   characters 
  of 
  the 
  female, 
  arc 
  so 
  closely 
  related 
  as 
  to 
  be 
  practically 
  

   indistinguishable 
  on 
  external 
  characters. 
  The 
  character 
  given 
  by 
  

   LeConte 
  and 
  Horn 
  (187G, 
  p. 
  30) 
  for 
  their 
  separation 
  does 
  not 
  hold 
  

   through 
  any 
  considerable 
  series, 
  and 
  in 
  any 
  case 
  is 
  very 
  indefmite. 
  

   It 
  may 
  be 
  that 
  the 
  two 
  forms 
  represent 
  the 
  extremes 
  of 
  a 
  single 
  rather 
  

   variable 
  species, 
  which 
  arc 
  being 
  arbitrarily 
  divided; 
  especially 
  since 
  

   the 
  geographical 
  ranges 
  overlap. 
  In 
  general, 
  from 
  s})eciniens 
  seen 
  

   so 
  far, 
  porosus 
  seems 
  to 
  range 
  not 
  so 
  far 
  north 
  as 
  sulcirostris. 
  The 
  

   male 
  genitalia 
  are 
  j)ractically 
  indistinguishablr. 
  The 
  median 
  orifice 
  

   in 
  sulcirostris 
  is 
  perhajjs 
  a 
  little 
  longer 
  and 
  the 
  flap 
  of 
  the 
  opening 
  longer 
  

   and 
  narrower, 
  the 
  a|)ex 
  a 
  little 
  more 
  pointed, 
  and 
  (he 
  keel 
  not 
  so 
  prom- 
  

   inent 
  near 
  the 
  a[)ex, 
  but 
  all 
  these 
  cliiiracters 
  are 
  subject 
  to 
  great 
  

   variation. 
  

  

  Measurements 
  in 
  millimeters 
  .— 
  lj(^nf!;i\i 
  0.8 
  to 
  9.5. 
  

  

  The 
  female 
  genitalia 
  are 
  much 
  more 
  easily 
  distinguished, 
  as 
  shown 
  

   in 
  figures 
  08, 
  a, 
  b, 
  c 
  and 
  OU, 
  a, 
  b, 
  c. 
  The 
  apical 
  plates 
  o{ 
  sulcirostris 
  aic 
  

   flattened, 
  twisted 
  at 
  an 
  angle 
  to 
  the 
  horizontal, 
  and 
  i)r(iadly 
  rounded 
  

   at 
  the 
  apices; 
  the 
  dorsal 
  keel 
  at 
  each 
  side 
  of 
  the 
  midline 
  is 
  very 
  jtronii- 
  

  

  726r.9S— 
  47 
  4 
  

  

  