MONOPHADNUS. 29 



The largest of the black and red species. Easily known by the large size of the 

 frontal foveae. 



16. Monophadnus mexicanus. 



Selandria mexicana, Norton, Trans. Amer. Ent. Soc. i. p. 248, iv. p. 84; Catal. p. 110, ? &c? x « 

 Hab. Mexico 1 . 



17. Monophadnus obsoletus. 



Mgro-violaceus, prothorace, mesonoto cum scutello pleuris tegulisque rufis ; alis violaceis, nervo radiali 



interstitiali, cellula cubitali 2 a loBgiore quam 3 a . <$ . 

 Long. 8 millim. 



Hab. Panama, Bugaba .(Champion). 



The antennae are thickened towards the middle, densely pilose, third joint nearly one 

 half longer than the fourth. Clypeus truncated in the middle, broadly rounded at the 

 sides; it, as well as the labrum, is covered with long hair. Frontal fovea? almost 

 obsolete ; in the centre of the lateral is a small round tubercle, frontal area with a 

 furrow open at the apex, surrounding the lower ocellus ; sutures on vertex deep, wide. 

 Eyes large. First radial cellule longer than the second ; first cubital cellule longer 

 than broad, third much dilated at the apex. 



Closely allied to M. imitatrioc and M. clypeatus, but differs from both in the frontal 

 foveas being almost completely obliterated, and especially the central, while in the 

 species just mentioned they are clearly defined, by the interstitial radial nervures, and 

 by the second cubital cellule being longer than the third. The claws are apparently 

 simple, and the metatarsus is a little shorter than all the other joints together ; the 

 anterior tibiae are dirty white in front. 



18. Monophadnus imitatrix. 



Niger, pronoto mesonotoque cum scutello rufis, ore, genibus tibiisque anticis sordide albis; alis violaceis, 



apice subhyalinis. 

 Long. 8 millim. 



Hab. Guatemala, San Geronimo, Quiche Mountains, Duenas, Capetillo (Champion). 



The antennae are a little shorter than the abdomen, moderately stout, covered with a 

 microscopic pile, the third joint nearly one half longer than the fourth. The four 

 apical joints abruptly shorter than the rest, and not much longer than broad. Sutures 

 on the vertex distinct ; lower ocellus surrounded by a triangular pit, the apex not being 

 so clearly defined as the base ; frontal foveae moderate, not united, the middle one smallest. 

 Clypeus with its edges rounded. The first radial cellule is a little shorter than the 

 second ; transverse radial nervure straight, not curved, received in the apical third of the 

 cellule, transverse median in the middle ; second cubital cellule scarcely half the length 

 of the third. Abdomen a little longer than the head and thorax, its apex with the 

 sheath pilose. The tarsi are about the length of the tibiae. Metatarsus about as long 

 as the four succeeding joints. 



