SELANDBIA.— MONOPHADNUS. 21 



10. Selandria ruficollis. 



Selandria ruficollis, Norton, Trans. Amer. Ent. Soc. i. p. 259; Catal. p. 121 \ 

 Hdb. Mexico 1 . 



11. Selandria varitarsis. 



Nigra, pronoto, mesonoto, mesopleuris tegulisque rufis ; antennis pilosis ; alis fumatis, cellula cubitali terfcia 



breviore quam secunda. 

 Long. 5 millim. 



Hab. Mexico (Salle) ; Guatemala, Cubilguitz (Champion). 



Antennae nearly as long as the abdomen ; third joint thinner at base than at apex, 

 longer than fourth ; three apical joints abruptly shorter than preceding, the ninth 

 thinnest, sharply conical. Sutures on vertex broad, moderately deep. Frontal area 

 interrupted in the middle, narrower and sharper-pointed at base than at apex, the suture 

 behind the ocellus being also deeper ; a large fovea in front of ocellus ; lateral antennal 

 foveae large, roundish, shallow, and running into the central one, which is not so wide. 

 Clypeus truncated. The first radial cellule is shorter than the second ; third cubital, 

 shorter than second, receives the transverse radial nervure a little beyond the 

 middle ; the transverse median nervure is received a little beyond the middle of 

 cellule. The greater part of the four posterior metatarsi is dull white, anterior black. 

 The legs are thickly covered with hair, which gives the tibiae especially a dull 

 appearance ; the metatarsus is shorter than the succeeding joints. The blotch is very 

 large. 



Similar to S. nigripes in coloration, but is smaller, the antennae are shorter, thicker, 

 and less pilose, the third cubital cellule shorter compared with second ; metatarsus shorter, 

 and white for the greater part. It may possibly be a variety of S. ruficollis ; but the 

 description is not sufficiently detailed to enable me to settle this point. S. ruficollis, 

 however, has the anterior femora and tibiae yellow, and the apical half of middle 

 femora and tibiae obscure reddish. Norton's variety very possibly belongs to S. varitarsis. 



MONOPHADNUS. 



Monophadnus, Hartig 1 , Blattwespen, p. 271. 

 Waldheimia, Brulle, Hym. iv. p. 665. 



The majority of the Neotropical species of Monophadnus differ from the Palaearctic 

 forms in the posterior coxae being larger, reaching sometimes to the fourth abdo- 

 minal segment; the metatarsus is longer than all the other tarsal joints together; and 

 the antennae are usually pilose, thickened beyond the middle, and with the last four 

 joints abruptly shorter. These three characters are found more or less in the other 

 genera of Selandriades inhabiting the Neotropical Eegion ; they are comparative 

 characters in all of them, and cannot be readily used in diagnosing genera. For instance, 

 while in some species of Monophadnus the posterior coxae reach or go beyond the 



