3<D ENTOMOLOGICAL NEWS [Jan., |l5 



vein r slightly before the fork of R2 plus 3, the distance about equal 

 to one-quarter of the cross-vein r. 



Abdominal tergites dark brown, the lateral margins rather bright 

 yellow ; ovipositor reddish chestnut ; sternites yellow. 



Holotype, 9 , Cordoba, Mexico. Larva in the water of 

 bromeliads; adult issued April 20, 1908. (Frederick Knab.) 



Allotype, $, Topotypic; adult issued May 5, 1908. 



Type in the U. S. National Museum ; allotype in the author's 

 collection. 



Since Mongoma bromeliadicola was first described, Mr. Pi- 

 cado's excellent work on the fauna of the bromeliaceous epi- 

 phytes has appeared and in this paper the author has given a 

 plate and figures of the larva and pupa of this insect.! M. 

 leuco.rena differs from all the known forms with pale knees in 

 its uniformly white tarsi. 



The Real Trigona dorsalis Smith Rediscovered 



(Hym.). 

 By T. D. A. COCKERELL, Boulder, Colorado. 



Mr. Frederick M. Gaige, of the University of Michigan, 

 sends me three workers of Trigona which he collected re- 

 cently in Colombia, when a member of the Bryant Walker 

 Expedition. The following data concerning them are taken 

 from his note book : 



"Cincinnati Coffee Plantation (20 miles inland from the 

 port of Santa Marta). July 12, 1914. Altitude, 5,000 feet. 

 Stingless bees ; found colony in deep forest, situated at foot 

 of huge buttressed tree; had cylindrical tunnel of wax cement- 

 ed on side of one buttress, with end free from the bark, ?4 inch 

 in diameter, opening rather more than ^4 inch. This is en- 

 trance to nest, 20 inches long, leading to ground in gradual 

 curve. Several bees about the opening, both entering and 



t Les Bromeliacees Epiphytes. C. Picado. Bull. Scient. de la France 

 et de la Belgique ; 7th series, vol. 47, fasc. 3, pp. 356, 357, pi. 13, Tigs. i. 

 2, 4- 



