Psyche [April 
ornatipes Becker, Wien. Ent. Ztg. IV. 69 (1890).............. Tyrol. 
punctifera Becker, Act. Soc. Fenn. X XVI. 32 (1901).......... Siberia. 
sabulosa Meigen, Syst. Bes. VI. 342 (1830)............... Kur. N. C. 
fenestrata Zetterstedt, Dipt. Se. I. 318 (1842). 
schwarzii Coquillett, Proc. U. S. N. M. XVIII. 440 (1895). N. Am. W. 
VAridiversipes; WalMO Var + ok hsbiems oes seks Be aren Tex. 
simplicior Wheeler and Melander, Biologia C. Am. Dipt. I. 375 (1901). 
Mexico 
styriaca Strobl, Mitth. Ver. Steierm. X XIX. 124 (1893)..........4 Alps. 
var. semifasciata Strobl, 1. ¢. 125. 
terricola Zetterstedt, Kon. Vet. Ak. Handl. 81 (1819)........ Eur. N. C. 
tuberculata Loew, Zeitscbr. Ent. Bresl. X VII. 19 (1863)........ Eur. C. 
undulata Strobl, Mem. Soc. Esp. III. 317. (1906).......... Eur. 8S. E. 
UNVUETSAILS SP oNOVi.nd eae be Rueda. cee ae eee Gre eae U.S. 
varipennis Coquillett, Proc. Ent. Soc. Wash. V. 266 (1903)...... N. EE 
vitripennis Bezzi, Jenaische Denkschr. XIII. 182 (1908)........ Afr. S 
EXPLANATION OF PLATE 3. 
The figures are drawn to practically the same scale of magnification, the 
eamera lucida being used. The enlargement is about twenty diameters. 
As but four of the exotic species (connexa Meig., incompleta Beck., ornatipes 
Beck., and punctifera Beck.) have been figured, I have included drawings of 
1. -Tachydromia enecator Mel. Dorsal aspect of head and thorax. 
2 ce agens, n. sp. ce “ec cc ce “ec “cc 
3 zs maculipennis Walker. Lateral aspect of hypopygium. 
4 enecator Mel. Wing. 
5. A maculipennis Walk. Wing. 
6. re calcanea Meig. Determination by Strobl. Europe. 
adh ne connera Meig. Determination by Strobl. Europe. 
8 = styriaca Strobl. Determination by Strobl. Europe. 
9 2 interrupta Loew. Determination by Strobl. Europe. 
10. es arrogans Linn. Determination by Kertesz. Europe. 
ib ig varipennis Coq. 
i: <s annulimana Meig. Determination by Bezzi. Europe 
13. o ciliata n. sp. 
14. 38 schwarzii Coq. 
ils Z simplicior Wh. and Mel. 
16. ee universalis n. sp. 
Tis id insularis n. sp. 
18. < calva n. sp. 
19. x agens n. sp. 
