191o] Cockerell — Meliponine Bees from Central America 11 



minute species has hitherto been known only from Peru. Face 

 all black. 



Trigona frontalis Friese. 



Patulul, Guatemala, Jan. 2, 1912, one specimen. Face-markings, 

 white. 



Trigona stigma Smith. 



Las Sabanas, Panama, Nov. 1911 (Nov. 14). In several speci- 

 mens the abdomen is yellowish white except at apex; in others 

 dark brown. This is, I believe, due to immaturity. A specimen 

 from Sangre Grande, Trinidad, March 16, 1912 (H. Scott) is con- 

 sidered to be the hitherto unknown male of this species. It is like 

 the worker, but with longer antenna;, and the anterior orbits are 

 very narrowly margined with creamy-white. Dr. Friese, to whom 

 a specimen of this species was submitted, considered it undescribed, 

 but it agrees exactly with Smith's description of stigma. 



Trigona bipunctata wheeleri subsp. nov. 



Worker. Smaller, length hardly 4| mm. ; wings suffused with orange ferruginous, 

 the color especially bright and strong in the costal region. Known from other black 

 Guatemalan species by the color of the wings, a variable light spot at each side of 

 the clypeus, and the upper part of the clypeus with a variably distinct keel. The 

 mandibles are bright red at apex. T. bilineata Say, from the Rio Nautla, Mexico 

 (Townsend) is hardly to be considered a distinct species, but it has not the orange 

 wings, and does not closely resemble the present insect. 



The new form is from Escuintla, Guatemala (type locality), 

 Dec. 20, 1911 (No. 11) ; Patulul, Guatemala, Jan. 8, 1912. Twelve 

 specimens in all. 



Dr. Friese, who examined a specimen of this species, referred it 

 to T. mexicana Guerin. I have what I consider to be T. mexicana 

 from the Rio Nautla, Mexico (Townsend); it has greyish-hyaline 

 wings, and is distinct from the present insect. 



Trigona pectoralis (Dalla Torre). 



Escuintla, Guatemala, Dec. 27, 1911 (No. 5). Professor C. F. 

 Baker sent me specimens of this species from San Marcos, Nica- 

 ragua, labelled T. dorsalis Sm., det. Friese. I have a true dorsalis 

 from F. Smith's collection; it has a long abdomen, and is evidently 

 distinct from pectoralis. 



