Occasional Papers of the Museum of Zoology 15 



Superior appendages and branches of the inferior minutely 

 tuberculate, each tubercle with a moderate bristle, longest on 

 the ventral and posterior parts of the branches of the in- 

 ferior; ventral branch of the superiors smooth and shining, 

 terminating in a point slightly more obtuse than the apex of the 

 superiors. The two branches reach, but do not overlap, the 

 broad flat plate which makes the basal part of the inferior; 

 at the extreme apex they are slightly divergent and directed 

 about cephalad. 



The following general color description was made from the 

 recently killed specimen : eyes above light blue, beneath gray. 

 Thoracic dorsum blue-gray, pale, marked black, the dark 

 stripes, on either side of the median black area, interrupted and 

 brown in color below the interruption ; sides about the same 

 color as the pale color of the dorsum, becoming slightly green- 

 ish below and behind. Abdomen black, marked with pale 

 blue gray, including the basal half of 7. 



Habitat : Colombia. 



Type Specimen : Ouebrada La Camelia, near Cristalina, 

 Department Antioquia, February 18, 1917, one male, J. H. 

 and E. B. Williamson, collection of E. B. Williamson. Named 

 for Jesse H. Williamson, whose daily companionship and as- 

 sistance in Colombia made our trip both pleasant and suc- 

 cessful. 



Habits: The small streams or quebradas where we col- 

 lected near Cristalina have been referred to before.*' We 

 reached the Ouebrada La Camelia, on our visit to it, just where 

 it issued from the forest to flow across a brushy pastiire. Two 

 or three himdred yards above this point, when approaching a 

 short pool with a small patch of exposed sand, I saw an ob- 



^ A Collecting Trip to Colombia, South America, Miscellaneous Publications, 

 Museum of Zoology, University of Michigan, No. 3, February, 1918. 



