648 SUMMARY OF CURRENT RESEARCHES RELATING TO 



somewhat questionable cases in Thymah/s. In Bruchus and other forms- 

 with legless larva? the Jeg-muscles belong to this class. The meta- 

 morphosing forms include all of the remaining larval muscles. The 

 histological nature of the changes are given in detail. 



Weevils of Crozet Islands.* — G. Enderlein describes, from the 

 material of the German South Polar Expedition, three new forms of 

 Ectemnorhinus. This type has hitherto been known only from Kerguelen 

 Island. One of the forms constitutes a new genus, Xanium, the others 

 are Ectemnorhinus richtersi and E. crozetensis, sp. n. They possess 

 short and very broad scales ; the hitherto known forms have long scales 

 as thin as hairs, though in some parts the hairs are transformed into 

 rather narrow but distinct scales. 



Natural History of British Lepidoptera.t— J. W. Tutt has published 

 the fourth volume of his encyclopaedic text-book for students and col- 

 lectors, which deals with the Sphingidae. 



Tsetse-Flies.f — E. E. Austen communicates a revised synopsis of the 

 Tsetse-flies (Glossina), one of which (G I. palpal is) is well-known as the 

 active agent in the dissemination of the dread disease of Tropical Africa 

 called Sleeping-sickness. He published a monograph, dealing with 

 seven species, in 1903 ; but already the attention paid to these insects 

 has increased the number of known species by one, and has afforded 

 material from which it has been possible to form a clearer view of the 

 characteristics of the various species. 



New Genus of Marine Diptera.§ — Rene Chevrel gives an account 

 of Scopelodromus isemerinus g. et sp. n., a new marine Chironomid, which 

 he found at Saint-Briac. The insect passes its larval life among the sea- 

 weeds and acorn-shells below the low-water mark ; it seems to have but two 

 generations in the year, for the adults are only seen twice a year running 

 or flying rapidly among the rocks, about the time of the equinoxes. 

 Both sexes are winged ; the males are much more numerous than the 

 females, perhaps 10 to 1, as in Glunio and a marine Chironomus. The 

 new genus differs from all other Chironomids in having in both sexes 

 7-jointed antennas, and also in the venation of the wings. 



Dipterous Parasites of Lepidoptera.j| — J. Kiinckel d'Herculais dis- 

 cusses the parasitism of the Bombylid Diptera of the genus Systropus in 

 the cocoons of Limacodid Lepidoptera, such as Sibine bonaerensis. In 

 winter the cocoons contain either the chrysalis of the Lepidopteron or 

 the nymph of the Dipterous parasite, resting in a state of " hypnodie" 

 As in other Limacodidse, the cocoons of Sibine bonaerensis have no 

 operculum to facilitate the emergence of the inmate. But both chrysalid 

 and nymph have a similar frontal chitinous point, and similar points at 

 the end of the abdomen, and similar energetic habits of working their 



* Zool. Anzeig., xxvii. (1904) pp. 6G8-75. 



t A Natural History of the British Lepidoptera, iv. (Sonnenschein, London, 

 1901) pp. xvii. and 535 (portrait and 2 pis.). 

 X Ann. Nat. Hist., xiv. (1904) pp. 151-5. 

 § Arch. Zool. Expe'r., i. (1903) se'r. 4, pp. 1-29 (1 pi.). 

 || Comptes Rendus, cxxxviii. (1904) pp. 1623-5. 



