( xliii ) 
the vecené abandonment of relatively ancestral patterns by 
certain species and the adoption of others which brought them 
into synaposematic relation with some more abundant 
Heliconine in the same locality. In giving this brief account 
of the hypothesis I am quite aware that the subject requires 
much fuller study. At the same time, I think it better not to 
wait for the more detailed examination which I hope to make, 
but to put the suggestion on record, in the hope that others 
may be led to further observation and reflection on the subject. 
Typgs oF Procrorrupip£.—Mr, A. J. Cuirry exhibited all 
the British species of the genus Gonatopus, except marshalli, 
Kieff., including the types of the three species described by 
Westwood, but entirely overlooked by subsequent authors, 
which had been lent him by Professor Poulton. The genus 
Gonatopus—lately dealt with by Professor Kieffer—though 
parasitic on Homoptera, resembles in appearance various ants. 
CoRDYLOBIA ANTHROPOPHAGA, A Parasitic AFRICAN FLy.— 
Mr. E. E. Austen, F.Z.S., exhibited specimens of and made 
remarks on larve, pup, and imagines of Cordylobia anthro- 
pophaga, Grinberg, an African Muscid Fly (known as 
the “Tumbu” or “Tumba Fly” in Sierra Leone), the larva 
of which is a subcutaneous parasite in man and _ other 
animals. 
Cases in which the larve of various species of Muscide have 
been found parasitic in human beings are numerous in medical 
literature, so much so that the term myiasis (Greek, puta, a 
fly) is employed to denote the maladies and injuries caused in 
this way. In most instances, however, as in that of Sarcopha- 
gine, which often deposit living larve on open sores or wounds, 
the parasitism is merely fortuitous, since the parent fly is 
attracted to the spot by the odours given off. But just as 
the (stride (Bot- and Warble-Flies) are in the larval stage 
normally parasitic in mammals (chiefly ungulates and rodents), 
and develop in no other way, so does Cordylobia anthropophaga, 
Griinberg, appear to be a “ pedo-parasite” of man, monkeys, 
dogs, and probably other mammals. The species belongs to 
the “Calliphorine” of Brauer, z.e. the section of the true 
Muscinz, the species of which are allied to the genus Calliphora 
(which includes the common Blow-Fly, C. erythrocephala, Mg.), 
