( gid) 
X. On the Life-history of Lonchaea chorea, Fabricius. By 
ALFRED KE. Cameron, M.A., B.Sc., Government Re- 
search Scholar, and Honorary Research Fellow, the 
University of Manchester. 
[Read October 18th, 1912.] 
Prats XI. 
InTRopUCTORY AND HisToRICAL. 
Towarps the end of the year 1911 some cow-dung amongst 
which small white Muscid larvae had been observed feeding, 
was received by me from Mr. Saunders of the Agricultural 
College, Holmes Chapel. The adults were reared, and Mr. 
Collin kindly identified them as Lonchaea chorea, F. The 
larvae were transferred to wire-gauze breeding-cages with 
a fresh supply of cow-dung and the temperature kept fairly 
high, ranging from 70° to 78° F. Under those favourable 
conditions of food and temperature the life-history was 
soon completed, pupation occurring in about twelve days 
and the adults appearing about ten days later. In the 
laboratory the whole development from the egg to the 
imago occupied about thirty days at the outside, where 
temperature and other conditions of nutriment and humidity 
were favourable. 
Bouché * in 1834 was the first to give an account of the 
life-history of L. chorea, and it might be useful to repeat his 
brief description. 
“Die Larve ist walzig, vorn verjiingt, glatt, weiss. 
Bauchgelenkstiicke gerieselt. Prothorax = Stigmata gelb, 
sieben- bis zehntheilig. Afterabschnitt schief, nach unten 
gestutzt. Die gelbbraunen erhéheten Stigmentriger sitzen 
an der obern Kante der Abstutzungsfliche und haben 
gebreite Stigmen.—Lange 3 Linien.—Man findet sie den 
Herbst und Winter hindurch unter fauler Baumrinde. 
“Teh habe noch bei keiner Fhegenlarve eine so schéne 
und zusammengesetzte Luftréhren-Verbindung gesehen, 
wie bei dieser. Um sie anschaulich zu machen, fiige ich 
auf Taf. vi, Fig. 1. eine Zeichnung davon bet. 
* Bouché, P. Fr., Naturgeschichte der Insekten, besonders in 
Hinsicht ihrer ersten Zustande und Puppen, p. 94, Taf. vi, fig. 1, 
TRANS. ENT. SOC, LOND, 1913,—PART II, (SEPT.) 
