﻿502 
  PROCEEDINGS 
  OF 
  THE 
  NATIONAL 
  MUSEUM. 
  vol. 
  44. 
  

  

  Habitat. 
  — 
  Ilolotype. 
  — 
  Female, 
  Culebra, 
  Panama. 
  

   Type. 
  — 
  In 
  U. 
  S. 
  National 
  Museum 
  collection 
  (No. 
  14921). 
  

   Related 
  to 
  M. 
  manca 
  Williston, 
  but 
  much 
  smaller 
  and 
  colorational 
  

   and 
  venational 
  details 
  different. 
  

  

  MONGOMA 
  LONGIFUSA, 
  new 
  species. 
  

  

  Brown; 
  stigmal 
  spot 
  distinct; 
  Ilo+a 
  longer 
  than 
  Rg 
  alone. 
  

  

  Length 
  4.4 
  mm; 
  wing 
  4.2 
  mm. 
  

  

  Female. 
  — 
  Head: 
  antennae 
  and 
  palpi 
  brown; 
  front, 
  vertex, 
  occiput 
  

   and 
  cervical 
  sclerites 
  brown. 
  

  

  Thorax: 
  Dorsum 
  brownish-yellow; 
  an 
  indistinct, 
  very 
  narrow, 
  

   brown 
  median 
  line; 
  transverse 
  suture 
  interrupted 
  medially 
  and 
  

   prsescutum 
  produced 
  caudad 
  into 
  two 
  obtuse 
  denticulse; 
  pleurae 
  dull 
  

   yellow. 
  Halteres 
  light 
  yellowish-brown. 
  Legs 
  uniform 
  brown. 
  

  

  Wings: 
  subhyaline; 
  cells 
  C 
  and 
  Sc 
  slightly 
  more 
  yellow, 
  stigmal 
  

   spot 
  and 
  extreme 
  tip 
  of 
  the 
  wing 
  pale 
  brown; 
  veins 
  light 
  brown. 
  

   Venation: 
  Scg 
  retracted 
  rather 
  far 
  toward 
  the 
  base 
  of 
  the 
  wing; 
  

   R2+3 
  between 
  r 
  and 
  the 
  fork, 
  longer 
  than 
  Rg 
  alone. 
  Basal 
  deflection 
  

   of 
  Cui 
  before 
  the 
  fork 
  of 
  M. 
  (See 
  fig. 
  1 
  0.) 
  ' 
  

  

  Abdomen: 
  light 
  brown; 
  lateral 
  line 
  black; 
  the 
  apical 
  segments 
  of 
  

   the 
  abdomen 
  slender, 
  tubular, 
  valves 
  of 
  the 
  ovipositor 
  very 
  slender, 
  

   arcuated. 
  

  

  Habitat. 
  — 
  Holotype. 
  — 
  Female, 
  Igarape 
  Assu, 
  Para, 
  Brazil, 
  Jan. 
  

   19, 
  1912 
  (Parish," 
  coll.). 
  

  

  Type. 
  — 
  In 
  Cornell 
  University 
  collection. 
  

  

  Related 
  to 
  M. 
  pallida 
  Williston, 
  but 
  differs 
  as 
  follows: 
  darker 
  in 
  

   coloration; 
  a 
  distinct, 
  though 
  'pale, 
  oval 
  stigma; 
  longer 
  fusion 
  of 
  

   R2+3, 
  etc. 
  

  

  Genus 
  LACHNOCERA 
  Philippi. 
  

  

  Lachnocera 
  Philippi, 
  Verb. 
  Zool.-bot. 
  Ges. 
  Wien, 
  vol. 
  19, 
  1865, 
  p. 
  615. 
  — 
  Osten 
  

   Sacken, 
  Monographs, 
  vol. 
  4, 
  1869, 
  p. 
  335. 
  

  

  The 
  foUowmg 
  description 
  is 
  adapted 
  from 
  Osten 
  Sacken: 
  ^ 
  

   Antennae, 
  at 
  least 
  those 
  of 
  the 
  male, 
  are 
  as 
  long 
  as 
  the 
  body, 
  13 
  segmented 
  (?); 
  first 
  

   segment 
  cylindrical, 
  stout, 
  elongated; 
  the 
  second 
  of 
  the 
  same 
  length 
  as 
  the 
  first, 
  

   gradually 
  attenuated; 
  the 
  following 
  ones 
  slender, 
  stouter 
  in 
  the 
  middle, 
  on 
  both 
  sides 
  

   with 
  long, 
  hii'sute 
  hairs; 
  the 
  last 
  segments 
  are 
  rather 
  indistinct. 
  Rostrum 
  short; 
  

   fourth 
  segment 
  of 
  the 
  palpi 
  equal 
  to 
  the 
  third 
  in 
  length 
  (?). 
  Wings 
  with 
  two 
  marginal 
  

   cells; 
  the 
  first 
  large; 
  the 
  second 
  short, 
  separated 
  from 
  the 
  first 
  by 
  an 
  oblique 
  vein; 
  

   a 
  single 
  submarginal 
  cell; 
  four 
  posterior 
  cells; 
  discal 
  cell 
  pentagonal; 
  basal 
  cells 
  elon- 
  

   gated, 
  the 
  second 
  longer. 
  Feet 
  slender. 
  

  

  LACHNOCERA 
  DELICATULA 
  PhUippL* 
  

  

  The 
  following 
  is 
  translated 
  from 
  Philippi's 
  original 
  description: 
  

   First 
  segment 
  of 
  the 
  antennae 
  testaceous; 
  remainder 
  and 
  palpi, 
  

   grayish-brown; 
  thorax 
  testaceous 
  with 
  brown 
  stripes; 
  coxae 
  and 
  

  

  1 
  Translation, 
  Monographs, 
  vol. 
  4, 
  1869, 
  p. 
  335. 
  

  

  8 
  Verh. 
  Zool-bot. 
  Ges. 
  Wien, 
  vol. 
  19, 
  1865, 
  pi. 
  23, 
  fig. 
  5. 
  

  

  