444 Dr. A. S. Packard, Jr's Revision of the 



zus ; 2d subcostal cell straighter, more triangular, lower side straighter 

 in the middle instead of towards the end of the cell ; 2d median recur- 

 rent anastomosing, 3d subcostal much shorter than in Stizus. Win as 

 much longer and narrower, outer edge much shorter than in Stizus. 

 Legs long and slender, much more so than in Stizus; abdomen long 

 and slender, cylindrical above, beneath much flattened, nearly twice as 

 long as the head and thorax together. Tip of % broad and spatulate, 

 with three long setas ; 9 broad spatulate ; no supraanal area. 



Differs from Stizus in the long, narrow, very prominent labrum, 

 shorter clypeus, broader front, slenderer palpi, the slenderer, smaller 

 body, long abdomen, the 9 tip of which is without the broad sub-tri- 

 angular area, which is present in Stizus and the family generally. 



Larra unicincta, Cress. 



Stizus unicinctu.t, Say, "West. Quart. Eep. ii. 77. (1823). Am. Eiit. pi. 2. (1S24). 

 Larra unicincta, Cress., Proc. iv. p. 472. (1865). 



% . Head and all the appendages daep uniform dull black ; surface 

 with scattered miuute punctures; thorax thickly punctured, shagreen- 

 like ; propodeum with large, coarse, almost confluent punctures, uni- 

 formly scattered over the large, triangular, broad, well marked enclo- 

 sure and on the flanks. Tegulae black, paler on the edges; veins 

 black ; wings blackish violaceous. Legs black sericeous, tarsi dark 

 fuscous ; tibiae deeply pitted with stout hair-like spines. Abdomen 

 black, polished, minutely punctured, basal two-thirds of 2d abdominal 

 ring pale red ; tip with three long spines, sides somewhat hirsute. 



9 . Differs in having more filiform antennas, a broader front, the 

 body less hairy, the sericeous legs, and the obtusely triangular tip of 

 abdomen. 



Length of the body, % .60 ; 9 , .70 inch. 



Colorado Territory and Kansas. (Coll. Eut. Soc. Phil.). 



The very dark wings, black, coarsely punctured body, and single red- 

 dish band on the 2d abdominal segment, will sufficiently distinguish the 

 only species known to inhabit the United States. It is a tropical genus. 



DESIDERATA. 



Larra moneduloides. Smith, Cat. Hym. Brit. Mus. iv, p. 346. (1856). 



"St. Johns Bluff, East Florida," (Smith). 

 Larra Servillii, Smith, Cat. Hym. Br. Mus. iv, p. 350. (1S56). 

 Bicyrtes Servillii, St. Farg., Hym. iii, 53, 1. (1845). 



"North America," (Smith). 

 Harpactus insularis, Cress., Proc. iv, p. 146. (1865). 



" Cuba," (Cundlach). 

 Harpactus scitulus, Cress., Proc. iv, p. 147. (1865). 



'•Cuba," (Cundlach). 



