POLYAENUS. 245 



3. Polyaenus championi. (Tab. IX. fig. 23.) 



Niger, flavo varius ; sterno, pleuris proparte, apice scutelli pedibusque, flavis, femoribus supra nigris; alis 



lenissime fumatis. $ . 

 Long. 16 millim. ; terebra 6 millim. 



Hab. Panama, Volcan de Chiriqui 2000 to 6000 feet (Champion). 



Antennae stout, longer than the body ; a yellow line on the scape beneath, the ring 

 on the flagellum narrow. Head punctured ; behind the centre of the vertex, and the 

 mandibles, black. Thorax punctured ; the pleurae obliquely striated, the metanotum 

 below the first transverse keel longitudinally, the rest transversely, striated. Base of 

 the metanotum smooth, impunctate, the part next to the transverse keel punctured. 

 The spiracles placed in an oval area, the part surrounding it finely and closely reticu- 

 lated. The prothorax in front, a broad Ahe on its edge, the tegulse, the tubercle beneath 

 them, a large oblique mark on the lower part of the mesopleurae, the mesosternum, the 

 greater part of the metapleura, two lines on the disc of the mesonotum, the carinae in 

 front of the scutellum, a large triangular mark on the apex of the scutellum, the post- 

 scutellum, and two large marks on the metanotum covering the tubercles, yellow. 

 First segment of the abdomen yellow, a large black mark covering the apex of the 

 petiole and the base of the postpetiole ; the second segment with a yellow spot covering 

 the gastrocceli, its apex yellow ; the other segments black, broadly yellow at the apex. 

 Legs yellow, the femora lined with black above ; a minute black spot on the middle 

 coxae, a broad black line on the hind pair ; hind trochanters black above. Apices of 

 the tarsi black. Areolet distinct, longer than broad, closed at the apex. 



4. Polyaenus nitidiusculus. 



Niger, flavo varius, nitidus ; pedibus flavis, supra nigro lineatis, tarsis posticis laete flavis. 

 Long. 15 millim. ; terebra 6 millim. © , 



Hob. Guatemala, Las Mercedes 3000 feet (Champion). 



Head yellow, the middle of the vertex behind, and the apex of the mandibles, black ; 

 face transversely striated. Thorax smooth, shining, impunctate, black; the prothorax 

 in front, a broad line on its edge, the tegulae, the tubercles beneath them, the greater 

 part of the meso- and metapleurae, a large mark beneath the hind wings, the edges of 

 the middle lobe of the mesonotum, a line joined to it in front of the yellow edge of 

 the pronotum, the carina? in front of the scutellum, the scutellum (except a large black 

 mark at the base), the postscutellum, a mark on either side of the metanotum, a large 

 mark covering the tubercles and extended above them, yellow. Metathorax shining, 

 impunctate; tubercles large, slightly curved. First abdominal segment broad; the 

 petiole not clearly separated from the postpetiole, black ; the base largely and a broad 

 band on the apex, yellow. The other segments black, yellow at the apex and beneath. 

 Legs yellow, the four anterior trochanters, the femora, tibiae, and tarsi, black above ; a 

 •small black mark on the apex of the four anterior coxae ; two large marks, joined at the 



