1924] The Biology of Trichopoda pennipes Nah. 9 
(1893), who records it from Argentina, Brazil, Mexico, San 
Domingo and Jamaica, and in the United States from New 
England to Florida, along the coast of the Gulf of Mexico to 
Texas, and in California. He speaks of it also from Michigan, 
Illinois, Indiana, and Iowa. It is essentially a lowland form, 
being most abundant within its range at elevations of five 
hundred feet or less. Aldrich (1915) states that the species 
‘‘appears to occur from Argentina north to about the latitute of 
Kansas, and further north to the eastward, but not in the north- 
west.’^ Records of its capture in St. Vincent, Porto Rico, and 
other islands of the West Indies are given in Aldrich’s Catalogue 
(1905). Wilson (1923) adds St. Croix, of the Virgin Islands 
group, to this list. 
HOSTS. 
The first record of the life history of Trichopoda pennipes 
appears to be a note by Packard (1875) of a Tachina fly parasitic 
upon the squash bug {Anasa tristis de Geer, Hemiptera, Coreidse.) 
While the species is not mentioned, the description points quite 
conslusively to T. pennipes. A. J. Cook (1889) records the insect 
by name and gives an account of its habit of parasitizing the 
squash bug. Later authors recording it as a parasite of the squash 
bug were Coquillett (1897), Chittenden (1899), and Weed and 
Conradi (1902). For a number of years no other host was 
known, but Morrill (1910) recorded a rearing of T. pennipes 
from the Northern Leaf -footed Plant Bug {Leptoglossus oppositus, 
Hemiptera, Coreidse). Jones (1918) records it as an enemy of 
the Southern Green Plant Bug or Pumpkin Bug {Nezara viridula, 
Hemiptera, Pentatomidse), and Watson (1918) also records this 
host in Florida, Drake (1920) also reared this parasitic fly in 
Florida from the Green Soldier Bug {Acrosternum hilaris, 
Hemiptera, Pentomidse), the Green Stink-bug {Acrosternum 
pennsylvanicum) and a large Coreid, Archimerus calcar ator. He 
also noted eggs on Acanthocephala femorata and A. declivis. 
Wilson (1923), in collecting Nezara viridula on the Island of St. 
Croix, found 93 per cent of the specimens parasitized by T. 
pennipes. 
