922 Mr. F. W. Edwards on 
median, longitudinal rilge; tibia finely spinialose ; anterior 
femora incrassated with three prominent spines beneath at 
apex. 
Long. 17 mm. 
Hab. South India; Coimbatore (7. V. Campbell). 
Syncrotus circumscriptus, Bergr. Proc. Roy. Soc. Vict. vil. 
p- 293 (1895). 
Bergroth described this genus and species from a 9 or 
@ specs., and his description requires some emendation. In 
the male the membrane reaches the abdominal apex and is 
considerably smaller than the other sex. ‘* Rufo-castaneus ” 
cannot be accepted as the predominant colour as stated by 
Bergroth, for the head and pronotum, in some cases the 
anterior lobe only, are black. 
Long., ¢ 6, 9 9 mm. 
Hab. Queensland; Kuranda (P. P. Dodd). 
XX.—Seme Parthenogenetic Chironomide. 
By F. W. Epwarps. 
So far as our present knowledge goes, parthenogenesis is of 
somewhat rare occurrence among the Diptera, but several 
instances of it have already been recorded in Chironomide, 
in the genera Tanytarsus and Corynoneura. In the case of 
Tanytarsus the first observations were made by Grimm in 
1870, and have more recently been confirmed and extended 
by Zavrel (vide Bause, Archiv fiir Hydrobiol., Suppl. Bd. i. 
1913, p. 17). The observations of both these writers 
concern the rare phenomenon of pupal parthenogenesis. 
Zavrel found that in the summer broods of Tanytarsus 
boiemicus, Kieff. MS., eggs could be produced partheno- 
genetically either by the pupa or by the imago very shortly 
after emergence; the pupze were often found floating dead 
on the water full of developing eggs, from which larvee 
eventually hatched. In all cases the adults reared from 
such larve proved to be females. 
Another case of parthenugenesis—in this mstanee of a 
more normal type—has been recorded by Goetghebuer as 
occurring in Corynoneura celeripes, Winn. (Bull. Acad. Roy. 
Belg. 1913, pp. 231-283). This author was able to rear 
three successive generations of parthenoyenetically produced 
eggs, which in every case yielded female adults, 
