﻿358 
  JOURNAL 
  OF 
  THE 
  WASHINGTON 
  ACADEMY 
  OF 
  SCIENCES 
  VOL. 
  12, 
  NO. 
  15 
  

  

  Described 
  from 
  three 
  specimens 
  in 
  as 
  many 
  blocks, 
  two 
  alate 
  specimens 
  

   of 
  which 
  the 
  type 
  has 
  the 
  wings 
  spread 
  and 
  one 
  young 
  nym.ph. 
  The 
  type 
  

   and 
  paratypes 
  are 
  temporarily 
  retained 
  in 
  the 
  author's 
  collection. 
  

  

  Calaphis 
  scudderi 
  Baker, 
  n. 
  sp. 
  

  

  Alate 
  viviparous 
  female. 
  — 
  Head, 
  thorax, 
  and 
  appendages 
  appearing 
  dark 
  

   brown. 
  Wings 
  transparent 
  with 
  rather 
  heavy 
  veins. 
  Abdomen 
  brownish 
  

   with 
  dark 
  markings 
  above. 
  

  

  Length 
  from 
  vertex 
  to 
  tip 
  of 
  cauda 
  1.28 
  mm. 
  to 
  tip 
  of 
  wings 
  1.92 
  mm. 
  

   Head 
  (fig. 
  11) 
  with 
  the 
  eyes 
  very 
  prominent 
  and 
  the 
  antennal 
  insertions 
  dis- 
  

   tinctly 
  transverse, 
  median 
  ocellus 
  outstanding. 
  Antenna 
  (fig. 
  9) 
  as 
  follows: 
  

   III 
  0.352 
  mm. 
  with 
  a 
  row 
  of 
  sensoria 
  which 
  stand 
  out 
  distinctly, 
  IV 
  0.256 
  

   mm., 
  V 
  0.32 
  mm., 
  VI 
  (0.08 
  + 
  0.864 
  mm.). 
  vSegments 
  distinctly 
  imbricated, 
  

   the 
  distal 
  one 
  with 
  the 
  base 
  not 
  prominently 
  marked 
  off 
  from 
  the 
  unguis, 
  

   in 
  this 
  respect 
  resembling 
  Monaphis 
  antennata 
  (Koch). 
  Cornicles 
  (fig. 
  7) 
  

   faintly 
  visible 
  but 
  apparently 
  short, 
  somewhat 
  tapering, 
  with 
  a 
  slight 
  con- 
  

   striction, 
  and 
  a 
  large 
  opening. 
  Wings 
  not 
  unusual, 
  the 
  fore 
  wing 
  (fig. 
  10) 
  

   showing 
  a 
  truncate 
  stigma 
  with 
  a 
  short 
  distally 
  set 
  radial 
  sector 
  which 
  is 
  

   little 
  curved 
  

  

  Cauda 
  and 
  anal 
  plate 
  (fig. 
  8) 
  not 
  clearly 
  visible, 
  but 
  the 
  anal 
  plate 
  some- 
  

   what 
  bilobed 
  and 
  the 
  cauda 
  from 
  the 
  visible 
  portion 
  in 
  all 
  probability 
  knobbed. 
  

  

  Described 
  from 
  one 
  specimen 
  with 
  the 
  wings 
  folded 
  over 
  the 
  back. 
  Type 
  

   temporarily 
  retained 
  in 
  the 
  author's 
  collection. 
  

  

  I 
  have 
  placed 
  this 
  species 
  in 
  the 
  genus 
  Calaphis 
  because 
  it 
  seems 
  nearer 
  

   this 
  than 
  to 
  any 
  described 
  and 
  I 
  am 
  loath 
  to 
  erect 
  a 
  new 
  one 
  for 
  its 
  reception. 
  

   It 
  represents 
  a 
  type 
  of 
  insect 
  not 
  present 
  in 
  the 
  Florissant 
  material 
  but 
  which 
  

   is 
  the 
  usual 
  type 
  of 
  living 
  forms. 
  This 
  is 
  especially 
  evident 
  in 
  the 
  wing, 
  in 
  

   the 
  shape 
  of 
  the 
  stigma 
  and 
  the 
  radial 
  sector. 
  It 
  indicates 
  that 
  while 
  the 
  

   more 
  primitive 
  forms 
  represented 
  by 
  Mindarus 
  are 
  present 
  in 
  the 
  Florissant 
  

   beds 
  and 
  abundant 
  in 
  amber, 
  the 
  more 
  recent 
  type, 
  dominant 
  today, 
  appears 
  

   only 
  in 
  the 
  amber. 
  

  

  G'EOhOGY 
  .—The 
  Lower 
  Paleozoic 
  section 
  of 
  southeastern 
  Pennsylvania.'^ 
  

   George 
  W. 
  Stose 
  and 
  Anna 
  I. 
  Jonas, 
  Geological 
  Survey. 
  

  

  The 
  facts 
  here 
  presented 
  are 
  the 
  results 
  of 
  comprehensive 
  geologic 
  

   studies 
  in 
  connection 
  with 
  detailed 
  surveys 
  in 
  southeastern 
  Pennsyl- 
  

   vania 
  by 
  the 
  writers 
  and 
  Eleanora 
  Bliss 
  Knopf 
  for 
  the 
  Federal 
  Geo- 
  

   logical 
  Survey 
  and 
  the 
  Pennsylvania 
  State 
  Geological 
  Survey. 
  A 
  

   brief 
  preliminary 
  statement 
  of 
  the 
  Paleozoic 
  section 
  that 
  has 
  been 
  

   worked 
  out 
  and 
  the 
  formation 
  names 
  that 
  have 
  been 
  applied 
  are 
  given 
  

   in 
  this 
  paper. 
  

  

  Twelve 
  miles 
  east 
  of 
  Lancaster, 
  Pa., 
  the 
  Cambrian 
  quartzites 
  of 
  

   Welsh 
  Mountain 
  plunge 
  southwestward 
  beneath 
  the 
  limestones 
  of 
  

   the 
  Lancaster 
  Valley 
  and 
  rise 
  again 
  a 
  few 
  miles 
  west 
  of 
  Lancaster 
  in 
  

   the 
  Hellam-Chickies 
  Hills. 
  

  

  1 
  Published 
  with 
  the 
  permission 
  of 
  the 
  Director 
  of 
  the 
  U. 
  S. 
  Geological 
  Survey 
  and 
  the 
  

   State 
  Geologist 
  of 
  Pennsylvania. 
  Received 
  August 
  5, 
  1922. 
  

  

  