272 PROCEEDINGS OF THE NATIONAL MUSEUM vol. io9 



85 (83). Anal cell with one distal pale spot 86 



Anal cell with two distal pale spots, which may be more or less coalesced 

 in a double spot 88 



86. Cell Rs with five separate pale spots, the distal one lying far from 



wing margin; mesonotum with a prominent pattern of punctiform 



brown dots; legs largely pale aureus Ortiz (p. 447) 



Cell Rs with three pale spots, the distal one nearly or quite broadly 

 attaining wing margin; mesonotum without pattern or with pattern 

 of large patches; legs dark 87 



87. Cell Rs with distal pale spot in form of an oblique double spot broadly 



meeting wing margin anteriorly; r-m crossvein pale; mesonotal pat- 

 tern of large pale and dark patches .... fluvialis Macfie (p. 407) 

 Cell R5 with distal pale spot rounded with narrower pale extension 

 barely attaining wing margin anteriorly; r-m crossvein with a prom- 

 inent dark spot; mesonotum rusty red, without prominent pattern. 



carsiomelas Wirth and Blanton (p. 365) 



88 (85). Cell Rs with one or more pale spots in distal half, past the poststigmatic 



pale spots; second radial cell short as usual; crossvein r-m pale . . 89 



Cell Rs without pale spot in distal half; with two round poststigmatic 



pale spots, one anterior to the other, and two smaller pale spots 



behind the greatly elongated second radial cell. 



macrostigma Wirth and Blanton (p. 395) 



89. Mesonotum with pattern of punctiform brown dots; distal pale spot in 



cell Ml often with very narrow extension to wing margin; distal pale 

 spot in cell Rs with an oblique, narrow extension to wing margin . 90 

 Mesonotum uniformly dark brown or with pattern of large dark and 

 pale patches; distal pale spot in cell Mj never connected to wing mar- 

 gin; distal pale spot in cell Rs otherwise 91 



90. Mesonotal pattern obscure, center of mesonotum not yellowish; an- 



tennal segment vii with sensoria. 



barbosai Wirth and Blanton (p. 400) 



Mesonotal pattern well defined, center of me.sonotum yellowish; an- 

 tennal s ^^ment vii without sensoria. 



gorgasi Wirth and Blanton (p. 402) 

 91 (89). Cell Rs with a separate fourth or fifth pale spot meeting the anterodistal 

 wing margin in full breadth and which may be narrowly connected 

 (in leopolthi) to a pale spot lying in front of vein Mi past middle of 

 cell; apices of veins Mi, M2 and M3+4 ending in a pale spot; mesono- 

 tum with conspicuous pattern 92 



Cell Rs without a separate fourth pale spot past the usual pale spot in 

 middle of cell, or if present it meets the wing margin rarely and not 

 in full breadth; apices of veins Mi (except in castillae and balsapam- 

 6en.s?s), M2 and M3+4 dark; mesonotum with or without pattern . . 93 

 92. Cell Rs with discal pale spot small and round and never with extension 

 to the anterior poststigmatic pale spot or to the distal spot at wing 

 margin; di^'^al mesonotum pattern of four pale spots arranged in a 

 four-leaf clover design reticulatus Lutz (p. 393) 



Cell Rs with discal poststigmatic pale spot irregular in shape with con- 

 nections always to the distal spot at wing margin and often an ex- 

 tension to a fifth small pale spot near vein Mi lying behind the an- 

 terior poststigmatic pale spot; discal mesonotal pattern with principal 

 pale areas arranged in a transverse row, each pale area containing a 

 few small brown punctiform dots leopoldoi Ortiz (p. 418) 



