212 Journal New York Entomological Society. [VoLXXIi. 



Female, length, 26.2 mm. ; wing, 18.3 mm. ; abdomen, 22.2 mm. 



Hind leg, femur, 13.9 mm.; tibia, 13.8 mm.; metatar.sus, 18.7 mm. 



Frontal prolongation of the head yellow, the nasus long, clothed 

 with dark hairs; the palpi and lips dark brown. Antenna with the 

 basal segments yellow, flagelium black, antennae with thirteen seg- 

 ments (not eleven as given by Osten Sacken). Head light yellow 

 except a linear brown blotch on the vertex along the inner margin of 

 each eye. 



Pronotal scutum brownish black, this color produced ventrad onto 

 the propleurK and including the anterior face of the pro-coxa. 

 Mesonotal prsescutum deep chocolate brown, darkest in front, with 

 three very narrow darker lines, one median, the other two lateral. A 

 yellow patch on the sides of the sclerite in front, before the pseudo- 

 sutural fovea ; a dark brownish black stripe begins at the pseudosuture 

 and traverses the mesopleurse, ending on the anterior face of the 

 mesocoxa, scutum, scutellum and postnotum dark chocolate brown, the 

 latter with a pale, narrow median line. Pleurx light yellow with the 

 vertical brown bands as described above; sides of the postnoturri and 

 the caudal face of the metacoxre brownish black. Halteres very long, 

 dull yellow, the knob brown. Legs with the coxae as described above, 

 trochanters greenish yellow, femora brownish black, tibiae brownish 

 black with the extreme base rather broadly white, tarsi white. Wings 

 with a rather uniform light brown suffusion, stigma dark brown; the 

 veins seamed with a light greyish brown. Venation as in fig. 2. 



Abdominal tergites brown, the lateral margins of the sclerites 

 rather broadly black which color runs across the dorsum as a sub- 

 apical band; extreme apices of the basal tergites paler; the terminal 

 tergites uniformly dark brown. Sternites dull yellow with an apical 

 annulus of black and in the terminal segments a medial band also; 

 the eighth segment black; hypopygium reddish. 



Distribution. — Guatemala, Cacao, Alta, Vera Paz, April 23 

 (Schwarz and Barber),' Purula, \'era Paz; altitude, 3.000 feet 

 (Champion). Venezuela, Cariaquito. Jan. 22, 1911 (S. Brown). 



The specimen from Cacao is a female in the U. S. National 

 Museum collection. The Purula specimen is Osten Sacken's type. 

 The Venezuela material consists of a fine pair in the collection of 

 the American Entomological Society, Philadelphia. 



This is the only species concerning which we have any ecological 



