614 PROCEEDINGS OF THE ACADEMY OF [DeC, 



nent. Antennce with first two joints black, the next three dark yellow, 

 the remainder light yellow. The palpi are black, hairy. Thorax 

 small, narrow, longer than wide, conical in front, densely punctulate, 

 with a small longitudinal median fovea at its posterior third. Scutel- 

 lum small. Elytra black, finely and closely punctured, with three 

 yellow bands placed much as in M. liquida Erichs. except that the basal 

 fascia has no tendency to become interrupted. The three longitudinal 

 veins or lines on the elytra are very distinct. Legs and under side of 

 body black, blackly pubescent. 



Type in my collection; cotype Cat. No. 12125, U. S. N. M. 



Two specimens taken March, 1908, on the flowers of Trihulus zegheri. 

 The specific name is a Bantu word meaning rare. 



51 Mylabris (M.) tricolor Gerst., Peter's Reis. n. Mozamb., (1862), p. 297. pi. 17, fig. 11. 



Humbe (Anchieta). 



Described from Mozambique. 



Type in Berlin, Konigliches Museum. 



52. Mylabris (M.) trispila Mars., Jorn.Sci.Math.Phys. Nat.Lisb.,VII, No.XXV,p.55, 1879. 



Loanda (Welwitsch), Huilla (Anchieta). 



53. Mylabris (M.) tristigma Gerst., Monatsb. Bed. Acad., 1854, p. 694. 



Described from Mozambique. The Angolan examples may be 

 regarded as at least representing a distinct western geographical race 

 which may be described as follows : 



Mylabris (M.) tristigma tribuli Wellm. subsp. nov. 



Nigra, angusta, valde elongata; capite crebre punctato, nigro-villoso; 

 antennis articulis primis duobus fulvis, reliquis flavis. Labrum fulvum; 

 palpis inflatis, truncatis, flavis; thorace crebre punctato, longitudine latiore 

 medio impresso, postice elevate. Elytra flava, fortiter punctata, nigro- 

 pubescentia; margine basalt maculis duabus antemedium {altera pone 

 suturam, altera majore laterali) fascia submediana apiceque nigris. Corpus 

 infra et pedes {tarsi primi postici excepti) nigra, nigro-pubescentia. 



Long. Corp. 20 mm. 



Lat. elytr. 5 mm. 



Hab. Gamba, Angola (Africa) ; ab auctore collecta. 



Typ. in coll. mea. 



This insect, which quite possibly represents a new species, is described 

 for the present as a subspecies of tristigma Gerst., from which it differs 

 inter alia by the longer and narrower body, the shape of the head and 

 eyes, the much larger black spots on the anterior part of the elytra, 

 the different marking of the posterior portion, which shows a complete 

 yellow band instead of the two yellow spots on a broad black apical 

 band, etc. 



