﻿33 
  G 
  REPORT 
  UNITED 
  STATES 
  ENTOMOLOGICAL 
  COMMISSION. 
  

  

  epicrarnium, 
  the 
  very 
  broad 
  clypeiis 
  being 
  indefinitely 
  bounded 
  behind, 
  

   the 
  front 
  edge 
  projecting 
  over 
  and 
  concealing 
  the 
  short, 
  broad 
  labrum, 
  

   and 
  the 
  edge 
  thickened 
  and 
  tridentate. 
  Mandibles 
  of 
  male 
  enormous, 
  

   their 
  base 
  partly 
  covered 
  by 
  the 
  clypeus. 
  The 
  gense 
  are 
  very 
  large 
  and 
  

   broad, 
  bounded 
  (in 
  part) 
  in 
  front 
  by 
  the 
  ante-antennal 
  curvilinear 
  fossae. 
  

   The 
  gula 
  is 
  solid, 
  long, 
  and 
  narrow, 
  extending 
  from 
  the 
  occipital 
  suture 
  

   to 
  the 
  mentum, 
  there 
  being 
  no 
  submental 
  suture; 
  lateral 
  sutures 
  sepa- 
  

   rate 
  the 
  mentum 
  plainly" 
  from 
  the 
  guise; 
  submentum 
  very 
  broad. 
  The 
  

   occiput 
  is 
  present, 
  appearing 
  as 
  a 
  short 
  and 
  broad 
  area, 
  with 
  a 
  median, 
  

   transversely-oblong 
  sternite 
  forming 
  the 
  base 
  of 
  the 
  gula. 
  (See 
  larva.) 
  

   Eaphidia 
  oJ)lita}^'^ 
  (PI. 
  LI, 
  fig. 
  5-7.) 
  Head 
  as 
  in 
  Oorydalus, 
  but 
  the 
  

   vertex 
  is 
  longer 
  in 
  proportion 
  and 
  the 
  clypeus, 
  being 
  smooth, 
  is 
  better 
  

   limited. 
  The 
  ocelli 
  are 
  either 
  present 
  or 
  absent, 
  and 
  there 
  is 
  no 
  distinct 
  

   area. 
  The 
  labrum 
  is 
  large, 
  the 
  clypeus 
  not 
  concealing 
  it. 
  There 
  are 
  no 
  

   fossae. 
  The 
  genae 
  are 
  very 
  large, 
  meeting 
  over 
  the 
  gula, 
  which 
  is 
  obso- 
  

   lete, 
  except 
  in 
  front, 
  where 
  it 
  is 
  broad 
  and 
  triangular, 
  and 
  forms 
  a 
  sub- 
  

   mental 
  region. 
  The 
  occiput 
  is 
  apparently 
  well 
  marked, 
  forming 
  the 
  

   neck, 
  and 
  with 
  a 
  suture 
  in 
  front. 
  

  

  THE 
  THORAX. 
  o 
  

  

  Notum. 
  

  

  Fronotum 
  {Corydalus). 
  Large 
  and 
  square, 
  about 
  

   as 
  long 
  as 
  broad; 
  full 
  in 
  front 
  and 
  sinuous 
  behind; 
  

   somewhat 
  hollowed 
  in 
  the 
  middle. 
  

  

  EapMdia. 
  (PI. 
  LIY, 
  fig. 
  10.) 
  Long 
  and 
  narrow, 
  

   rectangular, 
  very 
  slightly 
  excavated 
  in 
  front, 
  and 
  

   pointed 
  behind. 
  

  

  Mesonotum 
  [Corydalus. 
  (Fig. 
  12). 
  Praescutum 
  

   pronotuxn 
  of 
  Corydalus, 
  ^^oadly 
  subtriaugular, 
  shortcr 
  than 
  in 
  Eaphidia, 
  

   enlarged. 
  ^ 
  }q^i 
  morc 
  distiuct. 
  Scutum 
  completely 
  cleft, 
  the 
  

   praescutum 
  and 
  scutellum 
  touching; 
  each 
  division 
  of 
  the 
  scutum 
  sub- 
  

   quadrate. 
  Postscutellum 
  large 
  and 
  long, 
  very 
  wide, 
  and 
  well 
  devel- 
  

   oped. 
  

  

  Baphidia. 
  (PI. 
  LIY, 
  fig. 
  11.) 
  Praescutum 
  well 
  developed, 
  larger, 
  

   but 
  otherwise 
  as 
  in 
  Oorydalus. 
  Scutum 
  completely 
  cleft, 
  so 
  that 
  the 
  

   praescutum 
  meets 
  the 
  scutellum 
  ; 
  the 
  latter 
  shorter 
  than 
  broad, 
  obtuse 
  

   at 
  the 
  apex 
  in 
  front, 
  being 
  subtriangular. 
  Postscutellum 
  well 
  developed, 
  

   wide, 
  and 
  of 
  nearly 
  the 
  same 
  length 
  throughout, 
  but 
  incised 
  in 
  the 
  middle 
  

   to 
  receive 
  the 
  scutellum. 
  

  

  Metanotum 
  (Corydalus). 
  Praescutum 
  much 
  as 
  in 
  Eaphidia, 
  but 
  

   smaller; 
  scutum 
  not 
  entirely 
  divided; 
  scutellum 
  triangular, 
  less 
  acute 
  

   in 
  front 
  than 
  in 
  Polystoechotes, 
  but 
  more 
  so 
  than 
  in 
  Eaphidia. 
  Post- 
  

   scutellum 
  well 
  developed, 
  transversely 
  linear. 
  

  

  ^^ 
  Eaphidia 
  oblita 
  Hagen, 
  from 
  California. 
  

  

  