426 Dr. J. L. Hancock's Further Studies of TctriginiB. 



infuscate, hind tibiaj ferruginous, obscurely infuscate at the middle 

 jjart. The subgenital i^late of the female abdomen having the apical 

 marginal sinus broadly and yet quadrately excavate, equal in width 

 to the bases of both inferior blades of ovii^ositor, the small angulate 

 lobe thus formed on each side smooth, underneath the subgenital 

 l^late is infuscate. 



Entire length of body, female (front to end of wings), 15 mm. ; 

 pronotum 12"8 mm. ; posterior femora 7"5 mm. 



One example from Brazil, S. America, collected by Bates; 

 W. W. Saunders' collection, presented by Mrs. F. W. Hope 

 to the University Museum, Oxford. 



2. >S'. brevis, sp. no v. 



Male. — Colour : dorsum of pronotum, vertex, and the anterior 

 and middle legs brownish ferruginous, face below the eyes and 

 lateral lobes below the middle pale yellow ; lateral lobes above 

 obscurely infuscated or pale granulate ; the elytra, i^osterior femora, 

 and hind tibiae dark infuscate ; abdomen -pale yellow toward the 

 apex. Body small, pronotum and wings abbreviated, elytra immacu- 

 late; head little compresso-elevated, the base of the large globose 

 eyes much lower than the ■ middle dorsal summit ; vertex smooth, 

 sides convergent forward, nearly equal in width to one of the eyes, 

 viewed from above the frontal costa barely protrudes beyond the 

 anterior border ; frontal costa narrowly compressed between the 

 antennae, in jirofile convex, the face oblique. Pronotum very small, 

 anteriorly produced in an elevated uncinate spine, posterior process 

 acute not at all extended backward to the knees of hind femora ; 

 median carina percurrent, little obliqiiely ascendant forward, and 

 horizontal posteriorly; prozonal carinas subexpressed; lateral carinse 

 distinct at the humeral angles, anterior and middle femoral apices 

 not at all spined. 



Entire length of body from front to apices of hind femora, 9-7 

 mm.; pronotum 7'5 mm,; jiosterior femora 5-5 mm. 



One example from Cachabi, Ecuador, 500 ft., Nov. 1906, 

 collected by Rosenberg ; jDresented by Malcolm Burr to the 

 University Museum, Oxford. 



Explanation of Plate XXII. 



[See Explanation facing the Plate.] 



