176 AMERICAN HYMENOPTERA. 



''Female. — Black; a tuft on the vertex and another in front of the 

 anterior stemma pale yellow ; the thorax clothed above with pale pubes- 

 sence, which is continued down the sides in front of the tegulae ; the 

 thorax smooth and shining behind the scutellum ; the legs with very 

 short black pubescence; the wings fusco-hyaline. Abdomen nearly 

 naked, shining, incurved and very acute at the apex, the margins of 

 the segments thinly fringed with black pubescence." 



'' Hab. Oajaca, Mexico," 



Handlirsch apparently had a specimen of Smith's species. 

 He had a single specimen from Mexico (Puebla). He re- 

 marks concerning the species as follows : 



"This species agrees well with insularis in the plastic characters, 

 but is considerably smaller, 18 mm. The wings are rather strongly 

 infuscate, the thorax and the upper half of the head is yellow, all the 

 remainder is black haired. The callosities on the underside of the 

 sixth segment are somewhat less sharply impressed than in itisularis.'" 



This species appears to be much like laboriosus in colora- 

 tion, and it probably belongs to the Laboriosus Group. 



Psithyrus brasiliensis (F. Sm.) D. T. 

 Apathus brasiliensis Smith, Cat. Hym. Brit. Mus., II, 1854, p. 385, n. 



8, 9. 

 Psithyrus brasiliensis Dalla Torre, Cat. Hym., X, 1896, p. 566. 



Type. — Smith's specimen was located for me in the collec- 

 tion of the British Museum by Col. C. T. Bingham. 



I have never seen this species. Smith's description is as 

 follows : 



'' Female.— Length. 7 lines. Black; head subrotundate, the face 

 clothed with black pubescence, that on the vertex mixed with a few 

 yellow hairs. Thorax clothed anteriorly with long yellow pubescence ; 

 the disc shining, thinly covered with black hairs; the metathorax, the 

 sides and beneath have also a black pubescence ; the wings subhya- 

 line, their nervures ferruginous. Abdomen shining, the base thinly 

 clothed with black pubescence ; on the third and fourth segments it is 

 white, but on the apical ones it is black ; the apical segment incurved, 

 nearly naked and acute." 



''Hub. Brazil (Para)." 



While this seems to be a true Psithyrus, I doubt if it was 

 ever taken in Brazil, for the following reasons : 



1. The original description mentions white pubescence on 

 the third and fourth segments of the abdomen. The loca- 



