348 PROCEEDINGS OF THE ACADEMY OF [NoV., 



ing a longitudinal buffy tinge on the shoulders. Exposed portion 

 of wings shining, blackish brown toward sutural margin, remaining 

 half warm buff. Dorsal surface of abdomen shining blackish, show- 

 ing a rich chestnut tinge mesad. Forceps shining blackish brown 

 with a rich chestnut tinge. Limbs shining blackish brown. 

 The type of this remarkable species is unique. 



Microvostox ghilianii Dohrn. 



1864. L[abia] ghilianii Dohrn, Stett. Ent. Zeit., XXV, p. 424. [cf , 9 : 

 Para,i2 (Brazil); Cayenne, (French Guiana); Venezuela.] 



Charvien, lower Maroni River, French Guiana, V, 1 d^. 



From examination of this specimen, which appears to agree fully 

 with the description of ghilianii, we find M. schwarzi (Caudell) to 

 be a very closely related species, differing only in its decidedly 

 broader form. As a result the pronotum of the present species is 

 distinctly smaller in proportion to its body length, while the tegminal 

 width is contained in the tegminal length three times. In males of 

 schwarzi the tegminal width is contained in the tegminal length 

 about two and one-half times. The male genitalia in these species 

 show no diagnostic differences whatever. 



These species, as well as the genotype, M. alter (Burr), belong to 

 a species group having the head more strongly and evenly convex, 

 strongly suggesting the type usually encountered in the genus Labia. 



LABIINAE. 



Labia arcuata Scudder. 



1876. Labia arcuata Scudder, Proc. Bost. Soc. Nat. Hist., XVIII, p. 257. 

 [cf ; Vassouras, one hundred miles north of Rio de Janeiro, Brazil.] 



St. Jean du Maroni, French Guiana, III, 1 cf . St. Laurent du 

 Maroni, French Guiana, XII, 1 cf, 1 9. 



Labia dorsalis (Burmeister) 



1838. F[orficula] dorsalis Burmeister, Handb. Ent., II, abth. II, pt. I, p. 

 754. [Colombia.] 



Guadeloupe, West Indies, Id". St. Jean du Maroni, French 

 Guiana, V, 2 cf, 2 9. St. Laurent du Maroni, French Guiana, I 

 and XII, 2 cf,2 9. 



Prolabia unidentata (Beauvois) « 



1805. Forficula unidentata Beauvois, Ins. Recueil. Afr. Amer., p. 165, pi. 

 XIV, fig. 3. [San Domingo.] 



Port au Prince, Haiti, 1 cf . San Jaun, Porto Rico, 1 9 • 



12 Selected as the type locality on page 345, under the discussion of Spongo- 

 vostox asemus new species. It would appear very probable, from the literature 

 and Burr's figure, that the material recorded by Dohrn represented more than 

 one species. 



