﻿494 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM 
  vol. 
  oe 
  

  

  Female 
  genitalia 
  lightly 
  chitinized, 
  apical 
  plates 
  lacking 
  coxites 
  and 
  styli 
  

  

  very 
  small 
  robustus 
  group, 
  II 
  

  

  Female 
  genitalia 
  membranous, 
  with 
  supporting 
  rods 
  of 
  chitin, 
  apical 
  

  

  plates 
  extremely 
  small 
  or 
  lacking, 
  styli 
  large 
  decipiens 
  group, 
  III 
  

  

  Female 
  genitalia 
  wedge 
  shaped 
  speciosus 
  group, 
  IV 
  

  

  Eighth 
  sternite 
  produced 
  into 
  2 
  large 
  teeth, 
  curving 
  down 
  and 
  back. 
  

  

  lucaiius 
  group, 
  V 
  

   I. 
  DESERTUS 
  group 
  

  

  In 
  the 
  species 
  of 
  this 
  group 
  the 
  genital 
  organ 
  of 
  the 
  female 
  is 
  tubular 
  

   and 
  it 
  usually 
  has 
  well-developed 
  apical 
  plates 
  and 
  small 
  styli. 
  The 
  

   median 
  lobe 
  of 
  the 
  males 
  is, 
  in 
  general, 
  robust, 
  heavily 
  chitinized, 
  

   and 
  moderately 
  curved. 
  All 
  the 
  species 
  in 
  this 
  group 
  have 
  a 
  transverse 
  

   impression 
  between 
  the 
  base 
  of 
  the 
  rostrum 
  and 
  the 
  front 
  of 
  the 
  head. 
  

  

  KEY 
  TO 
  SPECIES 
  OF 
  DESERTUS 
  GROUP 
  

  

  1. 
  Elytral 
  striae 
  coarse, 
  the 
  punctures 
  round 
  and 
  distinct, 
  elytral 
  intervals 
  usually 
  

  

  of 
  nearly 
  equal 
  width, 
  and 
  convex 
  desertus 
  Horn« 
  

  

  Elytral 
  striae 
  fine 
  and 
  impressed, 
  punctures 
  fine, 
  intervals 
  flat 
  or 
  very 
  slightly 
  

   convex, 
  alternate 
  intervals 
  usually 
  wider 
  2 
  

  

  2. 
  Pronotum 
  coarsely 
  and 
  closely 
  punctate 
  3 
  

  

  Pronotum 
  finely 
  and 
  sparsely 
  punctate 
  4 
  

  

  3. 
  Apical 
  plates 
  of 
  female 
  genital 
  tube 
  rounded 
  on 
  outer 
  edges; 
  median 
  sulcus 
  

  

  of 
  rostrum 
  sharply 
  defined; 
  elytral 
  intervals 
  less 
  convex. 
  .geminatus 
  Horn 
  

  

  Apical 
  plates 
  of 
  female 
  genital 
  tube 
  toothed 
  or 
  irregular 
  on 
  outer 
  edges; 
  

  

  median 
  pulcus 
  of 
  rostrum 
  broad, 
  or 
  with 
  small 
  subsidiary 
  sulci; 
  elytral 
  

  

  intervals 
  more 
  convex 
  griseus, 
  new 
  species 
  

  

  4. 
  Smaller 
  (7 
  to 
  10 
  mm.); 
  brown, 
  usually 
  with 
  coppery 
  iridescence; 
  

  

  Utah 
  aeneus, 
  new 
  species 
  

  

  Larger 
  (12 
  to 
  18 
  mm.); 
  white 
  or 
  light 
  graj^ 
  with 
  conspicuous 
  fulvous 
  or 
  

   yellow 
  marking 
  along 
  the 
  sutural 
  intervals; 
  California 
  __ 
  mortivallis 
  Fall 
  

  

  EUPAGODERES 
  DESERTUS 
  Horn 
  

  

  Eupagoderes 
  desertus 
  Horn, 
  1876, 
  p. 
  34, 
  

  

  Eupagoderes 
  giganteus 
  Chittenden, 
  1926, 
  p. 
  169 
  (new 
  synonymy). 
  

  

  Form 
  robust, 
  convex, 
  dorsum 
  slightly 
  flattened. 
  Color 
  creamy 
  

   white 
  or 
  slightly 
  yellowish, 
  elytral 
  intervals 
  2, 
  4, 
  and 
  6 
  shghtly 
  darker; 
  

   a 
  rather 
  narrow 
  median 
  and 
  two 
  rather 
  wide 
  lateral 
  vittae 
  on 
  the 
  pro- 
  

   notum 
  darker, 
  these 
  often 
  feebly 
  defined. 
  Rostrum 
  robust, 
  moderately 
  

   arched 
  above, 
  not 
  markedly 
  constricted 
  basaUy 
  beneath; 
  trisulcate, 
  

   the 
  median 
  sulcus 
  narrow, 
  lateral 
  sulci 
  nearly 
  straight 
  apically, 
  

   converging 
  sharply 
  at 
  the 
  base 
  of 
  the 
  rostrum. 
  Head 
  and 
  rostrum 
  

   separated 
  by 
  a 
  well-marked 
  transverse 
  impression. 
  Head 
  smoothly 
  

   rounded, 
  and, 
  with 
  the 
  rostrum, 
  extremely 
  finely 
  and 
  rather 
  sparsely 
  

   punctate, 
  with 
  moderately 
  numerous 
  very 
  small 
  wliite 
  setae. 
  Prono- 
  

   tum 
  one-seventh 
  to 
  one-fifth 
  wider 
  than 
  long, 
  base 
  one-fifth 
  to 
  one- 
  

   third 
  wider 
  than 
  apex, 
  subobsoletely 
  sulcate 
  at 
  middle, 
  punctation 
  

   varying 
  fro 
  m 
  coarse 
  and 
  moderately 
  sparse 
  to 
  moderately 
  coarse 
  and 
  

  

  • 
  [See 
  notes 
  on 
  separation 
  of 
  the 
  closely 
  related 
  Eupagoderes 
  californicus 
  Ting 
  following 
  discussion 
  of 
  

   desertus.] 
  

  

  