1 865,] 45 



Genus THYREODON. Brulle. 

 Thyreodon grartdis. n. sp. 



Black: antennae fulvous: wings deep violaceous : metathorax irregularly, but 

 finely striated laterally and posteriorly. 



Fnnale. — Deep black, shining, slightly pubescent ; head entirely 

 black, the face densely punctured, lateral foveae of the clypeus very 

 deep ; antenme two-thirds the length of the body, fulvous, the basal 

 joint black, the two following joints rufous, the extreme apical joints 

 dusky. Thorax finely punctured ; mesothorax very minutely and in- 

 distinctly punctured, with the dorsal furrows rugose, broad, converging 

 on the scutellum and confluent behind the middle, each furrow with a 

 more or less well defined carina down the middle ; scutellum convex, 

 densely punctured, deeply excavated in front, with the carina on each 

 side of the excavation sharp and well defined ; metathorax opaque black, 

 depressed behind, with a broad, shallow excavation strongly contracted 

 at base, dorsal surface broadly depressed on each side of the disk, 

 .sides rather abrupt, surface irregularly, rather finely and longitudi- 

 nally striated behind, and transversely and more coarsely on the sides. 

 Wings uniform dark fuscous, with a brilliant deep violaceous reflection ; 

 nervures and stigma black. Legs entirely black. Abdomen elongate, 

 falcate, shining, impunctured, rather broad and compressed towards the 

 tip; basal segment longest slender, subcylindric, the tip slightly swollen 

 and convex; 2nd segment one-fourth shorter than the 1st, gradually 

 broader towards the tip, and on each side of the basal half a longitudinal, 

 shallow furrow; 3rd segment shorter than the 2nd and slightly longer 

 than broad, remaining segments broader than long ; ovipositor not ex- 

 serted. Length 15 lines; expanse of wings 21 lines. 



Male. — Resembles the female, but the wings are not so dark, the 

 apical margin being subhyaline, and the violaceous reflection is not so 

 deep ; the abdomen is longer and not so broad and compressed towards 

 the apex ; the 4th, 5th and Gth ventral segments are concealed by the 

 same dorsal segments, which are tightly closed over them ; at the ex- 

 treme apex of the venter there are two elongate processes, obliquely 

 pointed at the tip, and just above these, on each side of the last dorsal 

 segment, there is a straight, acute spine. Length 16 lines; expanse 



of wings 21 lines. 



Collection. — Ent. Soc. Philad. 2 9,1 £ , specimens. 



One of the female specimens has the head, with the exception of a 

 space behind the antennae covering the ocelli, entirely rufous, as well 

 as a subtriangular spot on each side of the thorax before the tegulre. 



I received this species under the name of Ophlon morio Fabr., but 



