408 HYMENOPTEBA. 



4. Agathirsia fulvo-castanea. 



Agathirsia fulvo-castanea, Westw. Tijdschr. voor Ent. xxv. p. 22, t. 5. ff. 9, 10 . 



Hab. Mexico {Coffin l ). 



AGATHONA. 



Agathona, Westwood, Tijdschr. voor Ent. xxv. p. 22 (1882). 



This genus was founded upon a single species from Mexico, 



1. Agathona sericaus. 



Agathona sericans, Westw. Tijdschr. voor Ent. xxv. p. 23, t. 5. ff. 11-15 \ 

 Hab. Mexico, Chapultepec {Coffin 1 ). 



Division POLYMORPH! 

 This is an artificial division used here solely for convenience in arranging the species 

 of our fauna. 



MACROCENTRUS. 



Macrocentrus, Curtis, Ent. Mag. i. p. 187 (1833) . 



X 1. Macrocentrus delicatus. (Tab. XVII. fig. 5, e .) 



'Macrocentrus delicatus, Cresson, Trans. Am. Ent. Soc. iv. p. 178 {<$ ? )\ 



Hab. Noeth Ameeica, Eastern, Middle, and Western States 1 . — Mexico ; Panama, 

 Volcan de Chiriqui 2500 to 4000 feet {Champion). 



As I am not quite sure whether the specimen from the State of Panama is identical 

 with M. delicatus (a very variable species) I give a description of it : — 



Testaceus, vertice, mesonoto, abdominis dimidio apicali flagelloque antennarum supra nigris ; alis fere hyalinis, 



stigmate testaceo, nervis fuscis. c? . 

 Long. 11 millim. 



Antennae longer than the body, covered with a stiff pile ; the scape bare, shining. 

 Head shining, the face sparsely punctured, with a furrow running from each antenna 

 down to the clypeus, the furrows converging as they reach it ; clypeus small, gradually 

 narrowed towards the apex ; palpi long, pilose. Thorax shining, sparsely punctured ; 

 metanotum transversely reticulate-striate ; lobes of the mesonotum distinct; a deep 

 and wide hollow, narrowed towards the apex, in front of the scutellum. Abdomen 

 more than twice the length of the thorax ; almost shining ; petiole long, narrow, 

 obscurely punctured, tuberculated before the middle, and longer than the second 

 segment ; the third and following segments obscurely pitted, and covered with a close, 

 moderately long, pale pile. Legs long and slender ; the long spur of the hind tibiae 

 reaching nearly to the middle of the metatarsus. Wings : first abscissa of the radius 



