1910} Melander — The Genus Tachydromia 61 
This species is related to agens as is evident from the shortened 
broad thorax with the humeri less pronounced than in typical Tachy- 
dromias, the broad palpi, the widened front, subterminal arista, and 
pruinosity of the body. However it is readily distinguishable by the 
paler color of the legs, antennae, halteres and root of wing. 
Catalogue of the Described Species of Tachydromia.' 
1. aemula Loew, Zeitschr. Entom. Bresl. XVII. 22 (1863)........ Eur. C. 
PA! MAGENS SDs TOW Jha ck oo << OMEN TR Ue eas ahs al alt iene PEN, A ios orc Wash. 
3. aliterpicta Becker, Act. Soc. Fenn. XX VI. 32 (1900)......... Kur. S. C. 
alteropicta Becker, Berl. Ent. Ztschr. XX XIII. 348. (1899). 
*4. annulimana Meigen, Syst. Bes. III. 69 (1822)................... Eur. 
albitarsis Zetterstedt, Dipt. Se. 1. 313 (1842). 
arrogans Linnaeus, Zetterstedt, Ins. Lapp. 546. var. d. (1838). 
cimicoides Fabricius, Walker, Ins. Brit. I. 140 (1851). 
umbrarum Haliday, Ent. Mag. I. 161 (1833). 
J. anrogans Linnaeus, Kauna Suec: 1857 (176l)e-2255-a..-254.-.-- Kur. 
bifasciata Rossi, Fauna Etr. Mant. II. 77 (1794). 
cimicoides Fabricius, Spee. Ins. II. 447 (1781). 
6. brevipennis v. Roser, Wuerttemb. Corresp. 1. 53 (1840)....... Eur. C. 
? microptera Loew, Ztschr. Ent. Bresl. X VIT. 26 (1863). 
nim) Calcancas Meigen  Syst- Besa Wille O5n(US38)i.. -eieele soe eae oe Eur. C. 
longipennis Loew, Ztschr. Ent. Bresl. X VIT. 29 (1863). 
85 icaloa sp) DOVE AUR eee REA Sr a ee eee ee 2 AA Georgia. 
9. catalonica Strobl, Mem. R. Soc. Esp. III. 319 (1906).......... Eur. S. 
var. striatipennis, Strobl. |. e. 320. 
Pe emGILiELO TSP) TOVis 2301 to. ear edatt is aele acetone toteecie cover Meee e Rharcie. «ool eee Mex. 
Hl eonnera ,Meicen (Syst: Bes. TILy 70° S38). 20 2b iin ode ce aeeee Eur. 
cimicoides Fabricius, Meigen, p. p. Klass. I. 239 (1804). — 
morio Zetterstedt, Ins. Lapp. 546 (1838). 
12. dichroa Bezzi, Jenaische Denkschr. XIII. 183 (1908).......... Afr. S. 
*13. enecator Melander, Trans. Am. Ent. Soe. XXVIII. 226 (1902) 
Alask., Wyom., Quebec. 
14. excisa Loew, Zeitschr. Ent. Bresl. XVII. 27 (1863)............ Kur. C. 
15. «incompleta Becker, Act. Soc. Fenn. X XVI. 33 (1901).......... Siberia. 
Pun ID SOLI CHT DS SINS, UTC Noe cat sist ste AG. ep NATE SR eel ts. 2 he's ey el brats Grenada. 
*17. interrupta Loew, Zeits. Ent. Bresl. XVII. 19 (1863)........... Eur. S. 
*18. maculipennis Walker, List. Dipt. Ins. III. 507 (1849) N. Am. 
pusilla Loew, Cent. V. 74 (1864). 
bimaculata Loew, Melander, Trans. Am. Ent. Soc. XXVIII. 204. 
19. minima Becker, Act. Soc. Fenn. XXVI. 32 (1901)............ Siberia. 
20. monserratensis Strobl, Mem. Soc. Esp. III. 318 (1906)......... Eur. S. 
21. ?morio (Zetterstedt) Walker, Ins. Brit. I. 141 (1851)......... England. 

1 Those species figured on the plate are marked with an asterisk. 
