24 HYMENOPTERA. 



Kohl (Termes. fiizetek, ix. p. 158) treats Podium and Trigonopsis as subgenera of 

 Pelopoeus. Podium differs from Pelopoeus in the prothorax being produced into a neck ; 

 in the third cubital cellule extending beyond the apex of the radial cellule ; in the eyes 

 reaching nearly to the base of the mandibles ; and in the middle coxae being widely 

 separated, and situated almost laterally. The antennas are placed close to the base of 

 the clypeus ; the head is somewhat triangular ; and the body is black, neither metallic 

 nor with yellow markings. Trigonopsis agrees with Podium (and differs from Pelopoeus) 

 in the prothorax being elongated, and in the third cubital cellule extending beyond the 

 radial ; but it differs from Podium in the middle coxae not being so widely separated, 

 in the prothorax being much more elongate, and the head and apex of the abdomen 

 triangular in shape, the head being greatly narrowed behind the eyes, the latter 

 reaching the base of the mandibles. The body is metallic; the second recurrent 

 nervure is usually interstitial. 



l. Pelopoeus caementarius. (Tab. II. fig. 9.) 



Sphew camentaria, Drury, Exot. Ins. i. p. 105, t. 44. figg. 6, 8. 



Pelopeus ccementarius, Saussure, Beise d. Novara, Hymen, p. 29. 



Sphew flavipunctata, Christ, Hymen, p. 301. 16, t. 30. fig. 1. 



Sphew lunata, Fabr. Ent. Syst. ii. p. 203. 



Pelopoeus lunatus, Fabr. Syst. Piez. p. 203. 4. 



Pelopoeus affinis, Fabr. loc. cit. p. 205. 5. 



Pelopoeus flavipes, Fabr. loc. cit. p. 202. 18; Smith, Cat. Hymen. Ins. iv. p. 233. 



Pelopoeus architectus, Lepel. de St.-Fargeau, Hist. Nat. Ins., Hymen, iii. p. 313. 



Pelopoeus solieri, Lepel. de St.-Fargeau, loc. cit. p. 318; Smith, Cat. Hymen. Ins. iv. p. 231. 



Pelopoeus canadensis, Smith, loc. cit. p. 233. 



Sphew jamaicensis, Fabr. Ent. Syst. ii. p. 203. 



Pelopoeus jamaicensis, Fabr. Syst. Piez. p. 204. 



Sab. Noeth Ameeica, Canada, United States. — Mexico, Ventanas 2000 feet, Presidio 

 (Forrer) ; Beitish Hondueas (Blancaneaux) ; Nicaeagua, Chontales (Janson) ; Panama 

 (Boucard). — Beazil ; Antilles. 



The numerous specimens from our region do not show much variation in colour, the 

 pronotum broadly above, the tubercles, tegulse, scutellum, postscutellum, a mark on 

 the side of the metathorax, the median segment, and a broad band on the second 

 abdominal segment, having the usual yellow markings. There is a slight variation in 

 the amount of yellow on the legs ; and the wings vary somewhat in tint. 



n/ 2. Pelopoeus vindex. 



Pelopoeus vindew, Lepel. de St.-Fargeau, Hist. Nat. Ins., Hymen, iii. p. 317. 

 Pelopeus vindew, Saussure, Reise d. Novara, Hymen, p. 31 \ 



Pelopoeus figulus, Dahlbom, Hymen. Eur. i. p. 23; Smith, Cat. Hymen. Ins. iv. p. 234. 

 Pelopoeus chilensis, Spinola in Gay's Hist, fisica y polit. de Chile, vi. p. 395. 



