﻿MELOLONTHID^E 
  OF 
  THE 
  UNITED 
  STATES. 
  229 
  

  

  sprinkled 
  with 
  small 
  white 
  scales. 
  Clypeus 
  (as 
  in 
  the 
  males 
  of 
  this 
  division) 
  deeply 
  

   concave, 
  with 
  the 
  sides 
  oblique 
  and 
  diverging 
  anteriorly, 
  margin 
  broadly 
  reflexed, 
  

   truncate 
  in 
  front, 
  and 
  reddish 
  ; 
  vertex 
  with 
  long 
  yellowish 
  hair. 
  Antennae 
  ferruginous, 
  

   club 
  much 
  longer 
  than 
  the 
  head. 
  Thorax 
  nearly 
  three 
  times 
  wider 
  than 
  long, 
  sides 
  

   rounded 
  and 
  oblique, 
  not 
  narrowed 
  towards 
  the 
  base, 
  margin 
  reddish, 
  disc 
  with 
  a 
  

   dorsal 
  channel 
  which 
  being 
  clothed 
  with 
  denser 
  white 
  scales 
  forms 
  a 
  narrow 
  vitta, 
  

   another 
  short 
  interrupted 
  vitta 
  is 
  seen 
  each 
  side, 
  but 
  in 
  one 
  specimen 
  is 
  very 
  indis- 
  

   tinct 
  ; 
  the 
  disc 
  near 
  the 
  anterior 
  margin 
  is 
  furnished 
  with 
  a 
  few 
  long 
  hairs 
  ; 
  the 
  sur- 
  

   face 
  is 
  shining 
  and 
  sparsely 
  punctured 
  ; 
  the 
  posterior 
  margin 
  is 
  fringed 
  with 
  long 
  hair. 
  

   Scutelluni 
  with 
  a 
  white 
  medial 
  line. 
  Elytra 
  shining 
  sparsely 
  punctured, 
  with 
  a 
  very 
  

   narrow 
  sutural 
  line, 
  and 
  a 
  short 
  basal 
  vitta 
  inside 
  of 
  the 
  humerus 
  more 
  densely 
  clothed 
  

   with 
  white 
  scales, 
  the 
  vitta 
  disappears 
  in 
  one 
  specimen. 
  Abdomen 
  clothed 
  with 
  small 
  

   white 
  scales 
  more 
  condensed 
  at 
  the 
  posterior 
  margin 
  of 
  the 
  segments, 
  anus 
  ferruginous. 
  

   Pectus 
  clothed 
  with 
  dense 
  long 
  hair, 
  legs 
  ferruginous 
  ; 
  anterior 
  tibiae 
  armed 
  with 
  three 
  

   acute 
  teeth. 
  

  

  2. 
  P. 
  ca 
  v 
  i 
  fron 
  s, 
  oblongo-cylindrica, 
  fusco-ferruginea, 
  pube 
  brevi 
  pallida 
  squamulosa 
  parce 
  vestita, 
  

   thorace 
  lateribus 
  rotundatis, 
  utrinque 
  angustato, 
  sulco 
  dorsali, 
  plaga 
  utrinque 
  basali 
  densius 
  pubescen- 
  

   tibus, 
  margine 
  basali 
  brevius 
  fitubriato, 
  elytris 
  rugosis 
  obsolete 
  tricostatis 
  et 
  vix 
  vittatis, 
  sutura 
  paulo 
  

   densius 
  pubescente. 
  Long. 
  -9. 
  

   Le 
  Conte, 
  Proc. 
  Acad. 
  Nat. 
  Sc. 
  Philada., 
  7, 
  222. 
  

  

  Sonora, 
  Dr. 
  Webb, 
  and 
  Mr. 
  Schott, 
  of 
  the 
  U. 
  S. 
  and 
  Mex. 
  Boundary 
  Commission. 
  

   Only 
  males 
  were 
  procured. 
  This 
  species 
  is 
  slightly 
  more 
  cylindrical 
  than 
  the 
  preced- 
  

   ing, 
  being 
  about 
  the 
  same 
  size 
  and 
  form 
  as 
  P. 
  variolosa, 
  of 
  a 
  reddish 
  brown 
  color 
  and 
  

   with 
  a 
  thin 
  covering 
  of 
  short 
  depressed 
  yellow 
  hair 
  ; 
  the 
  thorax 
  is 
  however 
  of 
  a 
  dif- 
  

   ferent 
  shape, 
  being 
  about 
  two 
  times 
  wider 
  than 
  long, 
  much 
  rounded 
  on 
  the 
  sides, 
  and 
  

   narrowed 
  both 
  in 
  front 
  and 
  behind, 
  the 
  disc 
  is 
  moderately 
  densely 
  punctured, 
  channeled, 
  

   with 
  the 
  sides, 
  dorsal 
  vitta 
  and 
  basal 
  spots 
  more 
  densely 
  pubescent 
  with 
  fine 
  short 
  

   yellowish 
  hair 
  like 
  scales. 
  The 
  anterior 
  part 
  of 
  the 
  disc 
  has 
  a 
  few 
  longer 
  hairs, 
  and 
  

   the 
  posterior 
  margin 
  is 
  fringed 
  with 
  not 
  very 
  long 
  hair. 
  The 
  head 
  is 
  formed 
  as 
  in 
  

   the 
  preceding, 
  sparsely 
  clothed 
  with 
  short 
  yellowish 
  hair, 
  with 
  longhair 
  on 
  the 
  vertex; 
  

   the 
  antennas 
  are 
  paler 
  ferruginous 
  with 
  the 
  club 
  not 
  much 
  longer 
  than 
  the 
  head. 
  The 
  

   elytra 
  are 
  finely 
  rugous, 
  not 
  very 
  shining, 
  with 
  three 
  faint 
  costaa, 
  which 
  appear 
  with 
  

   the 
  suture 
  more 
  densely 
  pubescent. 
  The 
  abdomen 
  is 
  densely 
  clothed 
  with 
  yellowish 
  

   scale 
  like 
  hairs, 
  the 
  pectus 
  as 
  usual 
  with 
  long 
  yellow 
  hair. 
  The 
  anterior 
  tibiaa 
  are 
  

   armed 
  with 
  three 
  acute 
  teeth. 
  

  

  3. 
  P. 
  s 
  ub 
  vit 
  t 
  at 
  a 
  , 
  cylindrica 
  ferrugineo-testacea, 
  parce 
  pallide 
  squamosa, 
  thorace 
  lateribus 
  fere 
  angu- 
  

   latis, 
  utrinque 
  angustato, 
  canaliculato, 
  trivittato, 
  elytroruni 
  sutura 
  vittisque 
  minus 
  distinctis 
  utrinque 
  

   tribus 
  albo-squamosis, 
  vitta 
  externa 
  ambiente. 
  Long. 
  1-10. 
  

  

  One 
  mutilated 
  male 
  found 
  by 
  Mr. 
  A. 
  Schott 
  on 
  the 
  Rio 
  Grande, 
  Texas. 
  More 
  

  

  59 
  

  

  