NO. 1966. SYXOPSIS 01' SEOTROPlCAh UMyOlSIXJJ—ALEXAynnil. 513 



KEY TO THE SPECIES OP MESOCVPHONA — COntinued- 



(>. Spots on the win-js scivnty, twenty or less eiseni, new species (l". Amer.). 



Spots on the wing numerous 7. 



7. Mosonotum with a dark line on either side of the pale median vitta; tuberculate 



pits between the dark lines 8. 



Mes>notuin with three very narrow dark lines; the median one passing between 

 the tuberculate pits costalii, new species (('. Amer., Cuba). 



8. Mosonotum clear gray; pleural stripes clear-cut, distinct. 



distincia Alexander ' (Southwest. V. S.). 

 Mesonotum yellowish; pleural stripes not clear-cut; indistinct 9. 



9. Spots on the wings not occurring in the cells; femora with a subapical brown band 



only dulcis Ostcn Sacken = (West. U. S.). 



Spots on the wings numerous inside the cells; femora with a medial and subapical 

 brown band (cahptera group) 10. 



10. Lighter colored northern form; hind femora with the post-medial yellow band as 



wide a.-" the subapical dark band, 



caloplera cahptera Osten Sacken ' (East. U. S.). 

 Dark southern form; hind femora with the post-medial yellow band much narrower 

 than the subapical dark band, 



calopteraff morn nigra, new subspecies (Cent. Amer.). 

 U. Femora with a single dark subapical band, 



immaailala, new species (Mexico, Cent. Amer.). 

 Femor.v witli Iwo dark lii\n(ls bieinctipes, new species (Brazil). 



ERIOPTERA (MESOCYPHONA) A^NULIPES Williaton. 



Erioptera anmdipes Williston, Trans. Ent. Soc. Lond., 1896, p. 294, female — 

 Hunter, Trans. Amer. Ent. Soc., 1900, p. 290.— Kertesz, Catalogus Dip- 

 terorum, vol. 2, 1902, p. 200.— Aldrich, Cat. X. Amer. Dipt., 1905, p. 84.— 

 Emderleix. Zool. Jahrbuch, 1912, pp. 54. 55, fig. Gl, female. 



}[ale. — Head: rostrum and palpi brown; antennre hrown; front, 

 vertex and occiput clear light gray. 



Thorax: mesonotal prffiscutum light brown; dorsal stripes very 

 indistinct, close together; pseudosuture shallow, elongate, pale, 

 tuberculate tips black, close together, the space between them about 

 equal to the diameter of one; scutum and post-notum similar to 

 praescutum; scutellura palHd, yellowish, with two indistinct dorsal 

 lines. Pleurie Ught brown, strij)es indistinct, the pale white band 

 between the second and tliird dark stripe, indistinct, narrow; sternum 

 whitish. Halteres wliitc throughout. Hind leg: coxa and trochanter 

 pale yellow; felnur long, wliite, with four blackish-brown rings, sub- 

 basal, premedian, post-median, and subapical, the last broadest; tibia 

 white with three rings, subbasal, median, and subapical, the last 

 narrowest; first tarsal segment black at base and tip; segments 3 to 

 5 all black. Middle leg similar to hind log, but first femoral band is 

 very small, indistinct, the omers gradually wider. Fore leg, similar 

 to hind leg, but only three femoral bands. 



I Psyche, vol. Ill, Dec.. 1912, pp. IM, lOfi. 



« Western Dipura, Bull. U. S. Geol. Surv., vol. 3. No. 2, pp. 198, 199 (April, 1877). 

 • Monographs, vol. 4, pp. 161, 162, male and female. 

 69077°— Proc.N.M.vol.44— 13 33 



