O. irritus, Wik. 
O. variabilis, Staeg.... 
O. intrudens, Wik. 
O. pervulsus, Wik. 
O. excerplus, Wik. 
O. nactus, Wik. 
O. oblidens, Wik. 
Oz effusus, Wik. 
O. incomptus, Wik. .. 
O. persidens, Wik. 
O. obditus, W\k. 
O. olivaceus, Wik. 
O. testaceus, Macq. ... 
O. exspatiens, Wik. . 
O. pertenuis, Wik. 
0. weg F.=C. odscu- 
rus, Mg... 
O. permacer, Wik, 
THE CHIRONOMIDE. 183 
pe Black. Legs brown, slender. Length, 14 lin. 
(do). 
Black. Thorax dingy, testaceous, with three broad, 
almost confluent, black stripes. Abdomen 
brownish-black, not pubescent. Legs brown, 
tarsi black. Length, 2 to 25 lin. 
Black. Thorax tawny, with three black stripes. 
Halteres testaceous. Legs ferruginous; tarsi 
and fore tibize blackish, Length, 3 to 34 lin. 
Black, stout. Wings black at base; halteres 
white. Legs dark brown, stout. Length, 1} to 
2 lin. (¢). 
Black. Legs black, femora piceous, testaceous at 
base. First, second and third veins brown. 
Length, r4 lin. (2). 
Black. Legs blackish, slender. Veins white. 
Abdomen long and slender. Length 14 to 2 lin. 
Deep black. Legs longand slender. First, second 
and third veins brown. Length, 24 lin. (2). 
Black. Abdomen dark brown. First, second and 
third veins pale testaceous. Legs hairy, dull 
testaceous. Length, I to 14 lin. 
( Black, stout. Thorax tawny above, with three 
broad black .stripes. Abdomen hairy, gray 
posterior edge toeaclisegment. Veins blackish. 
Legs tawny, stout; tarsi black. Length, 24 
Ll lin. (¢). 
(Black. Thorax dingy testaceous, with three 
| broad black stripes. Wings clouded with black 
..{ at base; first, second and third veins testa- 
| 
ceous. Abdomen pubescent. Legs brown, 
slender. Length, 2 lin. (2). : 
Testaceous, stout ; three black stripes on thorax. 
f Metathorax and pectus black. Abdomen 
+ brown, shining, pubescent. Legs ferruginous, 
{ slender; tarsi and fore tibiz dark brown. 
Length, 2 to 3 lin. 
Dull tawny green. Three black stripes on thorax. 
Pectus and metathorax black. Abdomen brown- 
ish. Legs tawny ; tarsi and fore tibiz brown. 
Length, 23 lin. 
Testaceous, stout. Thorax striped (3), brown in 
g, pale tawnyin 2. Metathorax brown in @, 
tawny: in 2. Abdomen brown, hairy, testaceous 
at tipin ¢, all testaceous in 9. Length, 1} to 
14 lin. 
Testaceouse Thorax with three luteous stripes ; 
metathorax brown. Brown bands on abdomi- 
nal segment in front. Legs stout, marked with 
brown. Length, 1} lin. (2). 
Pale testaceous, slender. Thorax slightly pro- 
duced in front. Legs slender. Length, 1 lin. 
(?)- 
Deep black. Wings milky white. Legs black, 
femora hairy, stout. Length, 14 to 2 lin. 
Black, slender. Pectus and abdomen beneath 
gray. Legs long and slender ; hind metatarsus 
more than two-thirds of length of hind tibia. 
zt Length, 2 lin. 
I3—2 
