44 SUMMAEY OF CURKENT RESEARCHES RELATING TO 



New Genus of Muscids with Blood-sucking Larvae. *^ — E. Roubaud 

 establishes a new genus, Chmromyia, allied to Aiichmeromyia. In the 

 case of Aiichmeromyia luteola ("ver des cases"), Fabr., the larvae bite 

 man and suck blood — hitherto a unique case. Roubaud finds the same 

 sort of habit in Choeromyia houeti sp. n., from the Cape Ant-eater 

 iOrycteroims), and in C. cho^roiihaga sp. n., from the wart-hog {Phaco- 

 chccrus). The larvae are very resistent, they live in the earth of 

 burrows, they are positively thermotropic, they fix on to the skin of 

 their hosts, and suck blood. 



Cutaneous Myiasis in Man.j — E. Roubaud has made some inter- 

 esting observations in regard to the African " ver du Cayor," the larva 

 of a Muscid, Cordylohia unthropophaga Blanchard, which lives beneath 

 the skin of man and domestic animals, causing tumours. It has been 

 maintained that the eggs deposited on the skin are hatched there, and 

 that the larvae work their way beneath the skin. Seventy-one eggs 

 were placed on the skin of various animals, but no infection ensued. 

 It has also been said that the eggs are licked in, and that the larvas, 

 hatching in the gut, work their way out like warbles. Twelve eggs 

 were given to a guinea-pig, in food, but nothing happened. On the 

 other hand, a guinea-pig put into a cage in which there were fifteen 

 larvae (in a plate with a little sand), showed six tumours, three days 

 afterwards. There can be no doubt that the larvae bore their way in. 

 The primary larva is hatched in the sand, and bores into the skin ; 

 towards the third day there is a moult and a secondary larva (like the 

 " macaque-worm " of Dermatohia) emerges ; on the fifth day there is a 

 second moult, and a tertiary larva emerges ; this completes its growth 

 in two or three days, and lies quiescent for a similar period ; then there 

 is pupation. Man's infection is facilitated by sleeping on the ground. 



Labial Glands of Hydrocorisae.J — E. Faure-Fremiet has studied 

 these in species of Notonecta, Naucoris, Nepa, and Lethocerus. He 

 describes the principal gland with its three kinds of secretions localized 

 in different regions, the excretory duct, which has a spirally coiled 

 chitinous band like a trachea, the accessory gland or reservoir, and the 

 salivary pump. 



Study of May-flies. § — Anna H. Morgan has made a study of the 

 may-flies of Fall Creek, Ithaca, where there is great variety of aquatic 

 conditions. She describes an interesting series of special adaptations. 

 A simple kind of breeding-cage, which floats in the water in the haunt of 

 the may-flies, has proved very effective. The author deals with repre- 

 sentatives of seventeen different genera, and describes the striking 

 peculiarities of Ephemerella nymphs, the emerging of BJasturus cupidus, 

 the swarming of Epihemcra and Leptophlebia, and the egg-laying of 

 Baetis. No male specimen of Amehtus was secured either by collection 

 or among eighty-three reared specimens, and it is suggested that this 

 species may present a case of parthenogenesis. 



* Comptes Rendus, cliii. (1911) pp. 553-5. 



t Comptes EenduB, civ. (1911) pp. 780-2. 



X Ann. Sci. Nat. (Zool ) xii. (1910) pp. 217-40 (1 pi. and 30 figs.). 



§ Ann. Entomol. Soc. America, iv. (1911) pp. 93-119 (7 pis,). 



