DIPTERA. 649 
A. Fourth longitudinal vein united heyond the base with 3rd and 5th by 
transverse venules ITypeualonia, g. n. 
B. Fourth longitudinal vein, if springing from the 3rd, united with the 
6th, if springing from the 6th, united with the 3rd, by a transverse 
venule. 
1. Fourth longit. vein produced to margin, separate from the 3rd. 
Exophosopa (Macq.) 
(type jF. capucina, Macq.). 
2. Third and fourth veins united before the margin. 
Heteralonia, g. n. 
II. Fifth and sixth longitudinal veins united before margin. 
Argyrospyla (Rond.) 
(type A. pandora, Macq.). 
Midto holosericeits (Loew.), according to Rondani (1. c. p. 60), differs in 
certain characters both from the restricted genus Mtdio and from the genus 
Glossista (Rond.), forming a new group intermediate between the latter and 
Anthrax. lie gives the following tabular view of the four genera : — 
I. Fourth longitudinal vein united at base with the 3rd and 6th ; proboscis 
as long as the head Mulio (Lat.) 
(type M. ohsettru^, Fab.). 
II. Fourth longit. vein united only to 5th at base. 
A. Proboscis as long as the head Glossista (Rond.) 
(type M. infuscata, Meig.). 
B. Proboscis scarcely exceeding the epistome. 
1. Third longitudinal vein arising against the root of the eighth j 3rd 
joint of antennoe lanceolate Logcocerius, g. n. 
(type 3£. holosericeiis, Loew). 
2. Third vein arising against or near the anterior transverse vein ; 3rd 
joint of antennse crepiform or conical . . Anthrax (Linn.), 
New genera : — 
Ilypcralonia, g. n., Rondani, p. 57 : see table suprtl. Type II. erythro- 
ccphala (auett.) ; new sp. II. sttrinamensis, Rond. p. 68, from Sininam j II. 
chilensis, Rond. p. 69, from Chili. 
lyophlccba, g. n., Rondani, pp. 54-56 = Comptosia (Macq.) ex parte. 
Fourth longitudinal vein united, beyond its origin, with the third and fifth 
by two transverse venules. Sp. L. luguhris, sp. n., Rond. p. 56, from Chili. 
Macrocondyla, g. n., Rondani, pp. 64-55= Comptosia (Macq.) ex parte. 
First joint of antennae very stout, third elongate, sublanceolate, style rather 
indistinct. Sp. M. pictinervis, Rond. p. 66, from Chili. 
Alyosia, g. n., Rondani, p. 64 = Comptosia (Macq.) ex parte. Fourth vein 
not united by a transverse venule either with the third or fifth ; submarginal 
areolae only two. Sp. A. maetdipennis, yeometrica, md apicalis (Macq.). 
Nomahnia, g. n., Rondani, p. 7\—Cyllenia (Lat.) ex parte. First joint of 
antennae not thickened, shorter than third ; proboscis longer than antennae j 
third longitudinal vein originating from fifth far from the base and beyond 
the base of the discoidal areolet, not connected with second by transverse 
venules. Type Cyllenia afra (Macq.). 
Alonipola, g. n., Rondani, p. 71. Allied to preceding, but third longitu- 
