Ilymenoplera from Central America, 265 



margined behind. The median segment is strongly rugosely 

 punctured ; in its centre are two keels near each other at the 

 base, then near the middle curving towards the sides. The 

 pleurje are strongly and coarsely punctured, especially the 

 metapleurffi. The abdomen is a little shorter than the thorax ; 

 the petiole is about three fourths the length of the abdomen, 

 which is shining, impunctate, ferruginous, darker towards the 

 apex. The apical half of the fore femora and the fore tibiae 

 and tarsi testaceous ; the middle tibiiB are infuscated ; the 

 hind legs are black, the femora broadly ferruginous at the 

 base on the inner side, the tarsi pale testaceous. Tiie wings 

 are hyaline, iridescent, slightly suffused with fuscous ; the 

 nervures deep black. 



In the large number of teeth (eighteen) on the hind femora 

 and in general coloration this species agrees with S. petioli- 

 ventrts, Cam., from the Pacific slope of Guatemala ; but it 

 is much larger, tiie petiole is longer and narrower, the thorax 

 is without markings, and the abdomen is ferruginous. 



Subfiim. Pebilampinm. 

 Perilampus, Latr. 



There arc six described species of this genus from North 

 America and one from the West Indies. The genus is mode- 

 rately represented in Europe. Nothing seems to be known 

 of the habits of the species. 



Perilampus mexicanus, sp. n. 



Nigro-cupreus, albo-pilosus, abdomine cseruleo, geniculis, apico 



tibiarum coxisque flavis ; alls hyalinis, nervis flavis. 5 • 

 Long. 4 millim. 



Hah. Mexico, Vera Cruz (//. H. Smith). 



AntennjB stout, black, the tip testaceous; the scape blue, 

 bare, furrowed beneatii, especially towards the apex ; the 

 flagellum covered with a close white pubescence. Tiie face 

 for the greater part bhack ; the part immediately below the 

 antennae bare, blue, the rest densely covered with white hair; 

 the vertex green, with golden or coppery tints, finely punc- 

 tured ; the tips of the mandibles testaceous ; tlie vertex and 

 the sides of the excavated face margined. Thorax above 

 coarsely rugosely punctured, reticulate at the sides and in 

 front, black, with green and coppery tints, densely covered 

 with Avhite hair; the outer edge of the mesonotum smooth 

 and impunctate; the scutellum is more coarsely punctured 



