-li- 
the neat. 
Phormia regina (^eig. ) 
Haag ( 129 ) in 1931" reported that maggots of the black blow- 
fly that had been given food sprinkled with rotenone crystals 
developed identically r 'ith the control maggots. 
Breakeyand Miller (38) in 1935 reported the results of tests 
with rotenone sprays prepared from an extract of derris in pine 
oil assaying 5 gin. of rotenone for each 100 cc. Emulsions were 
made from this stock containing 1 part of rotenone, 19 -parts of 
pine oil, 5 parts of saponin, and 75 parts of water. Dilutions 
made from these emulsions gave the desired concentrations of 
rotenone. One part of rotenone in 5,000 parts of the spray killed 
about 98 percent of the eggs. 
Phormia sp. 
Melvin, in 1936, in e typewritten report to the Division of 
Insects Affecting. Man and Animals, of the Bureau of Entomology 
and Plant Quarantine, United States Department of Agriculture, 
stated that when gfcown larvae of Phormia were dipped in a 1- 
percent solution of rotenone in acetone, 84 percent emerged. 
Chironomidae 
Chironomus brachialis Coq. 
C. cingulatus Meig. 
C. decorus Joh. 
C. lobiferus Say 
C. nervosus Staeg. 
C. sp. near nervosus Staeg. 
C. sp. near paganus Meig. 
See Fellton (85) under C hironomus te nuicaudatus Mall., p. 11 . 
C hironomus plumosus (L.) var. presinus Meig. 
An anonymous writer (6_) in 1937 stated that derris was 
ineffective. 
Chironomus tenuicaudatus Mall. 
C. sp. near tenuicaudatus Mall. 
Fellton (85) in 1940 reported on the control of aquatic 
midges. In the laboratory derris powder(5 percent rotenone) 
at 12 parts per million killed only 28 percent of Procladius 
larvae, whereas an emulsion of 80 parts of orthodichlorobenzene 
