I04 TRANS. ST. LOUIS ACAD. SCIENCE. 



very polymorphous one, and comprises very discordant materials. 

 No less than 99 British species are referred to it by Westwood. 

 {Synops. p. 47.) The bullae are noticed under the same specie* 

 which I possess. Those oi seminiger^ Cress. ? are B, C, D and 

 E, C and D not so widely separated. 



Tryphon atriCOXaS, n. sp. — 9 ?. — Black, ^ewrf subpolished, with fine, 

 confluent punctures, minute and sparse on the vertex and clypeus. Face, 

 but not the cheeks, a little prominent on the disk. Anterior \ of the cly- 

 peus, mandibles except their teeth, and palpi, pale rufous. Antennae f as 

 long as the body, brown-black, the scapus and part of the ist joint of the 

 flagellum covered beneath with long, whitish pubescence ; ist joint of fla- 

 gellum 2 J times as long as wide. Thorax subpolished, with fine, dense, 

 confluent punctures — finer, shallower and more sparse on the pleura. Scu- 

 tel elevated, its sides carinate, loftily towards its base, its anterior surface- 

 flattish. Metathorax coarsely rugose, the normal carinse all present, the 

 central area small and i wider than long. Tegula; yellowish-brown. Ab- 

 domen depressed, oval, with the ist joint subpolished and finely rugoso- 

 punctate, \ longer than wide, i wider behind than before, its sides straight 

 save a rounded tubercle at each anterior angle, and a smaller acute one 

 bearing the spiracle at f of the way to the tip ; the two dorsal carinae acute 

 and attaining the tip where they unite. The remaining joints subopaquc 

 except towards the tip, with minute, shallow, rather sparse puncture*. 

 Joint 2 with a basal and medial tubercle, each not far from the lateral edge. 

 Joint I coal-black ; joint 2, and the basal f of 3, rufous ; the rest blackish. 

 Venter dull pale rufous, obfuscated at tip. Legs rufous, moderately slen- 

 der, the coxae and the basal trochanters of all the legs black. Wings sub- 

 hyaline ; veins black ; stigma black, basally whitish. Radial area rather 

 short, its posterior angle about 115°. Areolet small, triangular, obliquely 

 elongate, and with a short petiole. Bulla; 5, A on the petiole, B normal, 

 C and D widely separated, and E longer than usual and almost touching 

 the angle of its vein. Length ? } .20 inch. Front wing 9 .'' .17 inch. 



One cf ; ? unknown. Belongs to Mr. Cresson's 4th Section. 

 Distinct from americanus^ Cress, cf, affinis^ Cress. $ (which is. 

 apparently the other sex of americanus)^ seminiger^ Cress. $^ 

 semirufus^ Cress. $, analis^ Cress, cf, festivus^ Cress, cf, cinctus^ 

 Cress, cf (Cuba), and claviventris^ Cress. <j (Cuba), by the col- 

 oration of its abdomen ; from tibialis^ Cress, a by the hind leg& 

 not being annulate with black and white ; and from rufocinctuSy 

 Cress. ?, minimus^ Cress. $, capHatus^ Cress, d", exiguus^ Cress.. 

 $ (Cuba), h'neo/aius, Bru\\6 $ (S. A.), and mesoxanthus^ BruU^ 

 $ (S. A.), by the coloration of the legs and the areolet not being 

 obsolete. 



[This is probably only a variety of T. ditnidiatus. — Cress.] 



