APPEXBIX. 411 



two butups goes, between orientah and iinivifiatum ; in the former 

 the two bumpi! are qiiile conspicuous, in the hitter the face in 

 profile i.s reduced to a single wide angle. J\I. pedium varies from 

 M. orientale also as follows : by the first pair of abdomiuiil spots 

 being rather larger, oval, and carried well over the sides of tl;e 

 2nd segment towards tlie base ; by the hind femora being wholly 

 yellow, and the hind tibiiu bearing only an indistinct median dark 

 ring, which is frequently absent. 



As there are altogether twelve specimens, all $ b^ , there can be 

 no doubt as to the validity of this form. The specimens are in 

 the Indian Museum, from the Simla and Darjiling Districts, the 

 United Provinces, Bengal ar.d Bangalore ; Mundali, Dehra Dun 

 District, W. Himalayns, 9000 ft., 10-12. v. 1910 ; Ghumti, Dar- 

 jiling District, 27. iii. 1910. The species is therefore widely 

 distributed in India and is not uncommon. Walker described 

 both j)(;(:Zi«m and cothoma from the "East Indies." 



Genus ASCIA, Mei<j. {ante, p. l(Jo). 



Ascia brachystoma, Wied. [ante, p. 106). 



Since the description and remarks on ]). 106 were printed, 

 I have seen in the British Museum a 5 example from Sarawak, 

 which is named with some reservation as this species, but is 

 referred to tlie genus Microdon. The insect in question is probably 

 a Microdon, and at the same time it agrees well with "Wiedemann's 

 description of A. hraclujstoma. ]S'evertheless, 1 hesitate to accept 

 the identification and to transfer the species to Microdon, since it 

 is retained under Ascia by Kertesz (Cat. Dipt, vii), who may have 

 examined the original type, if the latter be still extant. And the 

 resemblance of the British Museum specimen to A. brachnstoma 

 may be merely superficial. 



Genus ERISTALIS, TAitr. {ante, p. 155). 



The following 'may be added to the remarks on the life-history 

 of these insects: — A paper by J. Fahringer has recently appeared 

 (Zeitschr. wiss. InsektHubiol. xvii, pp. 113-124, 1922) on the 

 ])arasites and enemies of all the life-stages of Eristalis tcna.v and 

 certain other common European Eristai.ix.e : the list of enemies 

 includes 5 species of plants, nmong them (he fungus Emjnisa 

 musccc, and 7f3 species of animals (Protozoa, Arachnids, Myriapods, 

 insects of 5 Orders, fishes, amphibians, rt-ptiU'S, birds and 

 mammals). 



The description of E. curvipes on p. 192 was taken from that 

 of Schiner, as the species was then unknown to me. I ha\e since 

 seen specimens from Ceylon, and from these tlie followiiio; 

 redescriptiou is drawn. 



