DISCOVERY OF PROSPALTELLA LAHORENSIS. 21 
A careful search, covering several days, resulted in determining 
that the white fly was of widespread distribution. The infestation 
was quite similar to that already described as occurring at Saharan- 
pur. Although of general distribution, the fly was in no place so 
abundant as to be a serious pest. The smut so prevalent in white- 
fly infestations of Florida was almost entirely absent. While it was 
not a difficult matter to find large leaves in well-protected, densely 
foliated trees that contained large numbers of white flies, few were in 
a living condition. Those alive were in an early stage of pupation. 
Discovery of Prospaltella lahorensis, the True Internal 
Parasite of the Citrus White Fly. 
During the investigation at Saharanpur a few pupa cases of the 
citrus white fly were noticed to differ somewhat in appearance from 
those of normal shape. Some of these contained very small holes which 
were of such a character as could easily have been made by a lady- 
beetle or some other biting insect. However, when large numbers of 
these abnormally thickened pupa cases were found at Lahore, and 
always with a small rounded hole in the exposed surface, it was very 
apparent that this condition was the result of internal parasitism. 
Considering the type of the host as well as the character of the open- 
ing, one was at once led to infer that the parasite was of a Irymen- 
opterous species. The cold weather at this time of year had driven 
almost all insect life into hibernation, so it was impossible to find 
any living parasites. A large quantity of leaves containing insects 
which had been parasitized was collected and sent to the Bureau of 
Entomology in Washington. A careful examination of this material 
resulted in finding ^.ve dead specimens of a very minute insect, which 
Dr. Howard, Chief of the Bureau of Entomology, determined as 
belonging to the genus Prospaltella, of the hymenopterous subfamily 
Aphelininse. 
In stating the results of this examination Dr. Howard wrote: 
The specimens on leaves sent in by Mr. Woglum have been examined with great care. 
None of the full-grown larvse or nymphs contained pupal parasites, but five specimens 
of a very minute aphelinine of the genus Prospaltella were found dead and attached to 
the orange leaves in the vicinity of perforated Aleyrodes. The size of these specimens 
is such as to justify the conclusion that they had issued from aleyrodids, and their 
juxtaposition and the known habits of the genus confirm this conclusion. 
As the insect was new to science, it was described as follows by Dr. 
Howard: 1 
Female. — Length, 0.54 mm.; expanse, 1.42 mm.; greatest width of forewing, 0.25 
mm. Antennae long, not clavate; scape long, slender; pedicel nearly as broad as 
long; first funicle joint somewhat longer than second; second and third sub equal; 
club equal in length to second and third funicle joints together; terminal segment of 
i Journal of Economic Entomology, vol. 4, no. 1, p. 132, 1911. 
