16 PROCEEDINGS OF THE NATIONAL, MUSEQM. vol.64, 



Post-clypeus light yellow, prominent and bulging as in tenuis, over 

 three times as wide as long; posterior margin markedly convex, 

 border of head concave — more so than in tenuis; post-clypeus longer 

 than in tenuis but not as broad; not strongly bilobed as in tenuis. 



Pronotum same color as head, subcordate, wider than long, but 

 not as wide as head, not emarginate posteriorly, but anterior margin 

 indented in middle; with long bristles and short hairs on surface and 

 margins; not as long as the wing scale. 



Mesonotum not as long as and covered by wing scale, posterior 

 margin convex (emarginate in tenuis) . Metanotum also convex pos- 

 teriorly, longer than metathoracic wing scale, which is about half 

 the length of the mesothoracic wing scale. 



Legs light yellowish, elongate, slender. 



Wings gray-white or smoky, costal veins yellowish, margins ciliate,. 

 tissue punctate, fewer hairs on surface of wings than in tenuis, but 

 more hairs than in cardini Snyder (pi. 3, figs. 14-15) ; in tenuis the 

 hairs are arranged in rows, with fewer and shorter hairs on the hind 

 wing (pi. 3, figs. 16-17) ; median vein runs nearer to middle (between 

 subcostal vein and cubitus) than in tenuis, where the median is 

 nearer to the cubitus; cubitus and branches take up less area of 

 wing than in tenuis. 



Abdomen with dorsum same color as head, ventrally paler, golden- 

 yellow, densely covered with light yellow, short and longer hairs or 

 bristles. 



Measurements. — 



L. convezinotatus. L. tenuisM 

 Mm. Mm. 



Length of entire winged adult 9. 75-10. 25 9. -9. 75 



Length of entire dealated adult 5. 4. 7 



Length of head (posterior to tip of labrum).. 1. - 1. 3 1. 2 -1. 3 



Length of pronotum 0.47-0.50 0.47-0.55 



Length of hind tibia 0. 77- 0. 80 0. 805 



Length of anterior wing 7. 75 7. 50-7. 75 



Length of wang scale 0. 62- 0. 70 0. 50 



Widthofhead 0.80 0.802 



Diameter of eye (long diameter) 0. 18- 0. 20 0. 17-0. 20 



Width of pronotum 0.67- .70 0.65 



Width of anterior wing 1. 85- 1. 90 2. 00 



Soldier (pi. 1, fig. 8). — Head light yellow-brown, broadest poste- 

 riorly, not twice as long as broad, with but few short hairs and longei 

 bristles on head, lack of pubescence being distinctive specifically. 



Antennae white, with tinge of yellow, 15 segments, pubescent; 

 segments variable in size and shape; second segment short; third 

 long, clavate; segments become wider toward apex. 



" Specimens from the Beaumont collection, Panama, being slightly smaller than the tji^e from Brazil, 

 which is in turn smaller than McLachlan's specimens collected by Melliss at St. Helena. 



