122 AMERICAN HYMENOPTERA. 



legs ferruginous with the tibiae darker, and the tarsi light, almost 

 flavous. 



Abdomen with the basal segment, a lateral longitudinal stripe on 

 the second and a dorsal spot on the two apical segments ferruginous, 

 the rest shining black, with a slight bluish reflection. 



Described from one male specimen. 



Type. — American Entomological Society. 



This species is closely related to T. spectabilis, but may be 

 readily recognized by the entirely black wings, with purplish 

 reflection, and the ferruginous on the thorax, legs and part 

 of the abdomen. A series of specimens may show that the 

 tibiae are normally black. 



Distribution, — Guadalajara (Jal.), Mexico, August 27. 



Thyreodon ornatipemiis Cress. 

 Thyreodon or7iatipennis Cresson, Proc. Acad. Sci. Phila., p. 376, 



n. 4, 9 1873. 



" " Cameron, Biol. Centr. Amer., Hym., I, 



p. 290 1886. 



Dalla Torre, Cat. Hym., Ill, p. 186 1901. 



" " Szepligeti, Gen. Ins., Hym., 34me Fasc, 



p. 25, n. 18 1905. 



Brownish ferruginous ; antennce fulvous ; wings fuliginous with a 

 fulvo-hyaline spot extending across the middle and sometimes occupying 

 most of the base ; dorsum, of second abdomi^iat segment more or less 

 black. 



Length, 30-40 mm. ; wing, 22-25 mm. ; spread, 47-54 mm. ; antennae, 

 20-22 mm. 



Brownish ferruginous, clothed with fine short pubescence ; head 

 fulvo-ferruginous ; antennae fulvous, sometimes darker at the apexj; 

 ocelli small, distant from the tops of the eyes ; eyes medium sized, 

 broad, emarginate ; face finely punctured ; clypeal foveae deep ; man- 

 dibles stout. 



Thorax brownish ferruginous, densely and finely punctured and 

 pubescent ; mesonotum with parapsidal furrows deep, uniting at or 

 before its posterior border; mesopleurae and pectus shining, sometimes 

 with a small black spot below the base of the wings ; thoracic sutures 

 distinct, crenulated ; metathorax large, globular, very finely reticulate 

 and with median furrow, its apex at the insertion of the abdomen 

 deeply excavated. 



Wings fuliginous, with a fulvo-hyaline stripe extending across the 

 middle of the anterior and half-way across the posterior, sometimes 

 occupying most of the base of both ; nervulus interstitial ; nervellus 



