1920.] NATURAL SCIENCES OF PHILADELPHIA. 345 



least of the material which was before Burr may represent the 

 present species, we feel it advisable to fix the name ghilianii. We 

 do so, therefore, by selecting the type locality of Labia ghilianii 

 Dohrn as Para, Brazil. The material which Dohrn had from 

 that locality was collected by Ghiliani and it is reasonable to suppose 

 was that actually used in describing the species named in honor 

 of that collector. 



The heavier structure and broad head and pronotum distinguish 

 this insect from the species Microvostox, in addition to its having a 

 more deplanate head with evident sutures. 



Type: cf ; San Ignacio, Misiones, Argentina. [Paris Museum.] 



Size small for the genus, form moderately depressed. Head very 

 weakly depressed in area bounding the very weakly defined occipital 

 lobes, cheeks longer than eyes, caudal margin of occiput almost 

 evenly transverse, sutures very fine but distinct. Antennae with 

 first joint more elongate and slender than in herlandi, broadening so 

 that the distal half is somewhat the more ample; second joint 

 minute; third three-quarters as long as first, slender, cylindrical; 

 fourth joint slightly over half as long as third, slightly longer than 

 greatest width; fifth joint intermediate in length between third 

 and fourth; sixth joint as long as third. Pronotum smooth, show- 

 ing a very weak medio-longitudinal sulcus, length equal to width, 

 lateral margins almost straight, parallel, caudal margin showing a 

 very slight convexity; prozona tumid, metazona almost deplanate, 

 showing a very feeble convexity meso-proximad. Tegmina smooth, 

 without trace of keel, truncate caudad. Wings fully developed, 

 exposed portion about half as long as tegmen. Abdomen as in 

 herlandi except that it is more slender. Ultimate tergite rather 

 heavily punctulate except in meso-proximal section, with a weak 

 medio-longitudinal depression, caudal margin almost evenly trans- 

 verse. Pygidium strongly declivent, dorsal surface tapering with 

 a strong convexity to apex, which is briefly produced and truncate. 

 Forceps much as in herlandi except that the denticulations of the 

 internal surface are heavier both dorsad and ventrad, extending to 

 distal portion, with proximal tooth median in vertical position and 

 projecting as a small quadrate process, higher than wide, above 

 the pygidial apex on each side. Penultimate sternite with lateral 

 portions of caudal margin convex, these forming mesad a rounded 

 obtuse-angulate emargination. 



Length of body 7.5, width of head 1.1, length of pronotum 1, 

 greatest width of abdomen 1.7, length of forceps 2.6 mm. 



