GONATOPUS. 441 



orbits of the eyes on the inner side are bordered with white depressed hair. Thorax 

 covered with long fuscous hairs ; prothorax obsoletely punctured ; mesothorax closely 

 punctured, striated over the coxae, the anterior neck-like part margined at the sides, 

 broader than long, its teeth blunt; metathorax punctured, transversely striated. 

 Abdomen broad, tapering to a blunt point behind, the apex brownish, sparsely covered 

 (especially on the sides of the dorsum) with long, white, glistening hairs. The coxae 

 are, for the greater part, black behind ; the posterior pair are almost entirely black ; on 

 the underside they are covered with long white hair ; the hinder pair are very finely 

 punctured ; the anterior pair are almost shorter than the trochanters. All the tarsi 

 are black at the base, and the posterior tibiae are black at the apex. 



2. Gonatopus palliditarsis. (Tab. XVIII. fig. 21, $ .) 



Rufo-testaceus, tborace, antennarum articulis 5°-7 m abdominisque basi nigris, tarsis pallide testaceis. tf $ - 

 Long. 7-9 millim. 



Eab. Panama, Volcan de Chiriqui 2000 to 3000 feet {Champion). 



The antennae become thickened from the fifth joint, and have their third joint 

 nearly as long as the fourth and fifth together. Front deeply excavated, almost 

 shining, finely punctured, sparsely pilose ; over each antenna is a large fovea, and 

 between the foveae the head projects, this part being finely shagreened ; the lower 

 part of the orbits of the eyes bears long, depressed, silvery-white hairs. Mandibles 

 pale testaceous, the teeth piceous. Thorax covered with rather long scattered hairs ; 

 prothorax smooth, shining, obscurely punctured in front ; mesothorax almost cylin- 

 drical in front, narrow, becoming wider towards the apex, finely punctured and trans- 

 versely striated, the striations becoming coarser towards the apex ; scutellum almost 

 impunctate, shining ; metathorax transversely striated. Abdomen broad in the middle, 

 rather flat, shorter than the thorax. Anterior legs much longer than the body. 

 Coxae finely punctured ; the anterior pair more than one fourth longer than the tro- 

 chanters. 



The punctuation varies in intensity on the head and thorax. Sometimes the middle 

 of the mesothorax is quite smooth, especially above, and this is nearly always the case 

 with the pronotum. The centre of the front is often broadly black ; and the back of 

 the abdomen is sometimes suffused with fuscous. 



3. Gonatopus albomarginatus. (Tab. XIX. fig. 1.) 



Niger, antennarum basi, ore pedibusqne rufo-testaceis, coxis pro parte genibusqne posterioribus nigris, 



abdominis segmentis albo-marginatis. cf $ • 

 Long. 6-7 millim. 



Eab. Panama, Bugaba 800 to 1500 feet, Volcan de Chiriqui 2500 to 4000 feet 

 (Champion). 



Antennas with the third joint slender, longer than the preceding two together ; the 

 biol. CBNTE.-AMEK., Hymenopt., January 1888. 3 ll 



