266 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 115 



Discussion. — This genus was originally described to receive the 

 species X. youngi Kramer and X. colombiana Kramer. Osborn (1923, 

 p. 77) described Neocoelidia inflata, which has been found to be con- 

 generic with the two originally included species. Through the 

 cooperation of Dr. G. E. Wallace of the Carnegie Museum, the types of 

 Osborn's species were made available for study. The generic transfer 

 is made at this tune: Xenocoelidia inflata (Osborn), new combination. 



Key to Species of Xenocoelidia 



1. Coloration almost uniform ivory white except for tiny fuscous spot at tip of 



each clavus and yellow hyaline apical portion of each forewing; apex of 

 aedeagus in lateral view with sharp tooth and broad acute bladelike dorsal 



expansion (Colombia) X. youngi Kramer 



Coloration involving distinct markings on head and pronotum; apex of 

 aedeagus in lateral view appearing as two sharp points 2 



2. Head with two pairs of orange spots, one marginal between ocelh and one 



discal on crown. Pronotum with two orange-margined black spots near 

 anterior margin. Each lateral margin of scutellum with black spot. 

 Orange triangular spot at scutellar apex. Forewings unmarked except for 

 very slight enbrowning along commissural margin. Aedeagal apex in 

 posterior view with one pair of long antlerlike processes (Brazil) (genitalia 



illustrated in figs. 39-44) X. inflata (Osborn) 



Head with pale-yellow band below and a bright-orange band above anterior 

 margin. Pronotum with lateral margins and an irregular U-shaped anterior 

 central marking bright orange. Scutellum unmarked. Forewings marked 

 as follows: claval suture with a pale yellow band becoming obscure dis- 

 tally; clavus with dusky orange stripe running along scutellum and com- 

 missural margin; a brown spot flanks stripe laterally before apex of each 

 clavus. Aedeagal apex in posterior view with two pairs of comparatively 

 short processes (Colombia) X. colombiana Kramer 



Megacoelidia Kramer and Linnavuori 



Megacoelidia Kramer and Linnavuori 1959, p. 55. Type of genus Megacoelidia 

 splendida Kramer and Linnavuori by original designation. 



Description. — With distinct carina separating face and crown. 

 Shape of crown in dorsal view subquadrate, wider than long, scarcely 

 angular apically, distinctly concave, and with lateral and posterior 

 margins carinate. Ocelli on anterior margin of crown. Head includ- 

 ing eyes comparatively small, less than two-thirds as wide as pro- 

 notum. Posterior margin of pronotum broadly but slightly indented. 

 Antennae longer than entire length of body including forewings. 

 Venation of forewings obscure except apically. 



Ground color rich deep orange with or without black markings on 

 legs, pronotum, and forewings. 



Male genitalia : Valve lacking. Male plates fused basally. Pygofer 

 variously modified distally with elongations or processes. Anal tube 

 and styles simple. Connective Y-shaped and clearly articulated 

 with aedeagus. Aedeagus stout with apical portion recurved. 



