Mr. M. Burr — Notes on the ForficiiUiria. 491 



eTnarginatum, bilobiim, lobis rotundatis, fere totum obtectum, 

 angulis carinulatis ; 5 obtectum : forcipis bracchia c? depressa, basi 

 sat iucrassata, margine interno prope basin dente parvo arraata ; 

 in dimidio primo valde divergentia ; in dimidio apicali repente, 

 fere angulatim incurva, apice ipso sinuata ct ruiicronata ; ad 

 tertiam partem apicalem margine interno dento obtuso armata ; 

 ^ simplicia, recta, subcontigua, gracilia, S 5 . 



6. 2- 



Long, corporis 9'5-ll-5 mm. 10-11 mm. 



„ forcipis 3-3-5 „ 3-.5 „ 



Lat. max. abdominis. .. . 4-75-5 „ 3-75 ,, 



„ „ forcipis 3-3-5 



Patria. Venezuela : region of Merida (in coll. Gadeau de 

 Kerville et niea ; typus in coll. mea). 



This species I formerly confused with Ancistrogaster 

 iinpennis, Born)., but on a comparison with the original type 

 of the latter I find it differs in several respects : the forceps 

 are strongly bowed outwards and then inwards and have but 

 a small tooth at the base on the inner margin, in A. impennis 

 there is a powerful tooth at that place and the branches are 

 gently incurved ; in the new species the extreme tips of the 

 foiceps are strongly sinuate, as the anteapical tooth is obsolete, 

 but in^. impennis the two hooks are both strongly developed ; 

 in A. impennis the elytra have the exterior keel continued 

 throughout their length, in A. Kervillei it dies out half- 

 way down the elytra ; in A. impennis the pronotum is almost 

 square, in A. Kervillei it is transverse: in the final revision 

 both these forms will probably require new genera. 



I dedicate it to my friend M. Gadeau de Kerville, as a 

 slight token for his generosity in providing me with a large 

 amount of most interesting material, including three pairs in 

 good condition, of this new species. 



Opisthocosmia Poultoni, sp. n. 



Gracilis : antennae ?-segmentat8e, sat crassse ; segmento 3 brevi, 

 conico ; 4 sublongiori, conico ; 5 conico, etiam longiori ; nigrje 

 ( 13 segmenta restant) : caput laeve, rufum, margine postico recto ; 

 oculis parvis, nigris : pronotum planum, capite sublatius, margine 

 antico truncate, postico late rotundato, lateribus rectis ; planum 

 pallido-flavum, sublatius quam longius, lateribus vix retlexis : 

 elytra longa, angusta, humeris vix dilatatis, apice truncata, 

 fusco-castanea : alaj longae, pallido-flavae : pedes breves, testacei : 

 abdomen cylindricum, rufum, laeve, plicis lateralibus distinctis ; 

 scgmentum ultimum dorsale (S quadratum, fuseum, ]a!Ye, apice 

 subangustatum, declive, margine postico subsinuato, angulis 

 oblique truncatis : pygidium brevissimum, transversum, integrum : 



