54 HYMENOPTEBA. 



which runs from one antenna to the other. Clypeus truncated at apex; labruns 

 rounded. Mandibles large, with one large apical tooth. Blotch very wide, white. 

 Abdomen longer than head and thorax together. Legs of moderate length; coxae 

 stout. The metatarsus is shorter than the other joints together ; the long spur reaches 

 to its middle. Claws small, simple. The sheath of saw is covered at the apex with 

 long hairs; the saw itself bears stout waved teeth. The radial cellule has a stout 

 bordering nervure above, which does not form a distinct appendicular cellule at the 

 apex. First cubital cellule more than double the length of second on lower side ; 

 second one fourth longer than broad. The basal nervure is interstitial. The breast 

 inclines to piceous in colour, as does also the pleurae immediately below the wings, 

 and the pro thorax laterally. The palpi are 4- and 6-jointed; first joint of maxillary 

 half the length of second, which is about the same length as fifth, third and fourth 

 subequal ; sixth longer than any of the others ; the basal joint of labial is thinner than 

 the rest and longer than fourth ; second and third subequal, broader than long. 



LOBOCEKAS. 



Cephalocera, Norton, Trans. Amer. Ent. Soc. i. p. 5. 1 ; Cat. p. 20. 

 Loboceras, Kirby, List of Hymen, i. p. 79 (1882) . 



This genus is closely allied to Cephalocera and Incalia, with both of which it agrees 

 in having the same number of joints in the antennae and in the neuration of the wings, 

 but differs from Incalia at least (the structure of the trophi in Cephalocera is unknown) 

 in having the palpi 6- and 4-jointed, the spurs much longer, while there are spines 

 only on the middle legs ; in Incalia and Cephalocera they are on the posterior tibiae. 



The posterior coxae are large, reaching to the fourth abdominal segment ; the claws 

 are simple. The mandibles are formed pretty much as in Incalia ; but, as above men- 

 tioned, the palpi are very different, being long, filiform, and 6- and 4-jointed. The first 

 joint of the maxillary palpi is small, the others subequal. The labium is large and broad ; 

 the palpi have the two first joints the longest, the two apical ones a little shorter and 

 thicker. 



The genus is exclusively Neotropical, and contains eight Central -American species 

 and two from Amazonia. 



1. Loboceras varicorne. 



Testaceum, capite (ore excepto), antennarum medio, scutello, aMominis apice, tarsis tibiisque posticis fere totis 



nigris ; alis fumatis, medio navo-hyalinis. 

 Long. 9 millim. 



Hab. Panama, Volcan de Chiriqui 4000 to 6000 feet {Champion). 



The antennae are not much longer than the head and thorax, densely pilose, sub- 

 clavate; third joint about one half longer than fourth; the last two joints subequal ;, 



