Occasional Papers of the Museum of Zoology 63 



A female apparently not in full color and an immature indi- 

 vidual probably pertaining to this species were taken at 3400 

 feet, under leaves, on July 15. 19 13. 



Holotype, ]\I. C. Z., 5,154. 



Tricomorpha setosior, sp. nov. 

 PI. 24, Figs. 165, 166 



The type, which may not be in full color, is at present 

 light horn-brown above with the keels light. Sides, venter, 

 and legs fulvous. 



This species seems easily distinguishable from the others 

 here described by the peculiarities of keels and dorsal sculp- 

 turing. The keels have the lateral margin finely but distinctly 

 serrate, there being typically on a median segment four to six 

 serrations caudad of the usual one back of anterior corner, 

 each bearing a seta. The posterior processes of keels in mid- 

 dle and posterior regions have the tip more or less bent mesad, 

 this curvature being particularly noticeable on the most caudal 

 ones. (See PI. 24, Figs. 165 and 166.) 



All metatergites are strongly densely tubercular, the tuber- 

 cles becoming weaker on keels. Tubercles shorter, more 

 nearly circular in outline than, c. g., in tuberculosa and rugo- 

 sclla, and correspondingly more numerous. Three somewhat 

 irregular rows back of transverse furrow in addition to a 

 marginal series of much smaller tubercles on caudal edge, 

 and four or five rows in front of the furrow. Tubercles all 

 bearing rather long setae, which form a conspicuous feature. 



Length, about 20 mm. ; width, t^.2 mm. 



Colombia : San Lorenzo. One female taken under leaves 

 in forest at 4.500 feet on July 20, 1913; F. ^L Gaige. Holo- 

 type. M. C. Z.. 5.157. 



