52 MR. R. E. TURNER ON 



of the abdomen, by the absence of a tubercle at the base of the 

 second ventral segment, by the yellow clypeus and mandibles 

 and ferruginous legs in the male, and by the red colour of the 

 fifth dorsal segment, the presence of seven (instead of six) carina? 

 on the second dorsal segment, the longer and narrower pygidium, 

 and the puncturation of the thorax in the female. 



Encopothynnus, gen. nov. 



6 • Pronotum widely emarginate anteriorly ; abdominal seg- 

 ments strongly constricted at the base ; ventral segments 3-6 with 

 a snine on each side at the apical angles, dorsal segments 2-5 

 with a spine on each side at the apical angles ; hypopygium very 

 broad, broader than long, the sides parallel, the apical margin 

 narrowly emarginate near the middle on each side of the short 

 apical spine ; maxilla? strongly bearded. 



2 . Clypeus convex, without a carina ; pronotum much longer 

 than broad, with a median sulcus ; second abdominal segment 

 without carina?, the sculpture not differing from the other seg- 

 ments; fifth dorsal segment with a longitudinal carina; sixth 

 segment compressed laterally, the dorsal plate obliquely depressed, 

 very narrow, slightly broadened to the apex. 



This genus is somewhat allied to Doratithynnus, but may be 

 distinguished by the spines on the dorsal segments of the male, 

 and by the undifferentiated second dorsal segment of the female. 

 In must of the allied genera, such as Tmesothynnus and 

 Accmthothynnus, the maxilla? of the male are strongly bearded. 



Type of the genus, E. spiviulosus. 



Encopothynnus spinulosus, sp. n. (PL I. figs. 9, 10.) 



$ . Rufo-ferruginea, ; sterno, postscutello, segmento mecliano, 

 coxis, trochanteribus, femoribus, tarsis intermediis et posticis, 

 tibiis intermediis supra posticisque totis, mandibulis macula 

 basalialba, antennisque nigris ; clypeo margine anteriore, pronoto 

 linea angusta transversa antice, tegulis basi, postscutelloque linea 

 angusta transversa, albis ; alis hyalinis, venis fuscis. 



§ . Nigra ; capite, prothorace, scutello pygidioque rufo- 

 ferrugineis ; tibiis tarsisque fusco-ferrugineis. 



Long., S 8-10 mm. ; $ 3-7 mm. 



S . Clypeus broad, very slightly convex, not much produced, 

 and narrowly truncate at the apex. Antenna? of almost even 

 thickness throughout, short, shorter than the thorax and median 

 segment combined ; interantennal prominence obsolete. Head 

 and thorax sparsely but not finely punctured ; pronotum as 

 broad as the head, widely ema,rginate anteriorly ; median segment 

 rounded, finely and closely punctured. Abdomen narrower than 

 the thorax, the segments strongly constricted at the base, the 

 sides not parallel, the third segment the broadest ; dorsal segments 

 2-5 with a small spine on each side at the apical angles, those on 



