48 [February, 



finely rngose ; fifth ventral segment of abdomen emarginate fringed 

 with decumbent golden cilia, those at the sides being very long) 

 .... prasi7ius Sm. 



8 (7) Seventh segment not wholly blood-red. 



y (12) Robust species with tomentose abdominal markings, the (3th ventral 

 either with a median longitudinal carina covered with minute haiis, 

 or else with two bare shining ridges, strongly converging towards 

 the base, the subtriangular area between them pubescent and 

 flattened or depressed. 



10 (11) Sixth ventral segment with a median carina inteiTupted towards the 



base ; basal abdominal segment polished and very sparsely punctured 

 on the disc; hind metatarsus diirk 



.... zonulus Sm, 



11 (10) Sixth ventral segment with convergent ridges; basal segment 



generally less shining and not very sparsely punctured on the disc ; 

 hind metatarsus, except as a rare aberration, whitish yellow on at 

 least the basal part leucozoiiius K. 



12 (9) Sixth ventral .segment not as in either of the preceding (some species 



are narrow, with long cylindrical abdomen; many are quite small 

 and, in some, tomentose abdominal markings are absent). 



13 (16) Flagellum of antennae black or blackish fuscous beneath, abdomen 



with tomentose spots, its ventral segments seen from the side with 

 copious long erect hairs. 



(Mesonotum densely, evenly punctured, propodeum closely longi- 

 tudinally rugose on its anterior area, lateral areas much smoother, 

 punctate, not margined behind, three basal abdominal segments 

 black right up to the apical margin, the first with copious, distinct 

 puncturation ; hind metatarsi pale flavous). 



14 (l-j) Inner margin of stigma generally testaceous, sometimes brown; 



extreme apex of the stipites of the genitalia hairy, as well as the 

 lacinia * ■i-uof.atns K. 



15 (14) Inner margin of stigma dark brown or nearly black ; end of the 



stipites of genital armature not hairy 



.... lativenU'is Sch. {dccipietis P.). 



16 (13) Flagellum of antennae in most species distinctly rufescent or some- 



times fulvescent beneath ; if blaclf, either the ventral abdominal 

 segments have only very short hairs beneath, or tomentose spots 

 are wanting. 



17 (36) Second venti'al segment (viewed from the side) with at most very 



short erect hairs on its middle part, sometimes with only very short 

 subdecumbent ones, or even almost glabrous ; antennae always long, 

 reaching at least to the end of the thorax when laid back. 



18 (27) Antennae with the flagellum black or blackish fuscous beneath. 



19 (20) Scutellum for a large part at least (and often wholly) roughly sculp- 



tured and without definite punctures, the sculpture being unlike 

 that of the mesonotum ; antennae very long, when the head is laid 

 back they reach at least to the end of the fii'st abdominal segment 

 .... fulvicornis K. ab. 



* In a recent work Judj^e P. Bliithgen has fliowii that the much wider face of i-iiolatux sepa- 

 raten it from fa/ivcjitrix, an exoellent character ovixlooked by nie. 



