78 



Orthoirhapha brachycei'a. 



Fig. 30. M. atricapillns, 

 male forceps. 



with whitish grey hind margins of the segments and similarly coloured 

 hind corners and side margins. Venter grey. Abdomen clothed with 

 short, depressed hairs which are yellowish, but black in the middle 

 line, or all black and only the longer hairs at the side margins of 

 the first segments yellow; the hairs on the last segment are always 

 black. At the hind margins of the segments there are somewhat weak 

 bristles, they are yellow, sometimes with sorae black intermingled. 

 Venter sparingly clothed with long, pale hairs, black at the apex. 

 Genitalia rather small, black; the arms of the upper forceps curved 



very slightly down towards the apex, 

 with nearly parallel margins, rounded 

 at the end and very slightly excised 

 above ; the lower forceps reaching two 

 thirds of the lenglh of the upper; the 

 eighth ventral segment has in the 

 middle of the hind margin a broad 

 prolongation which is more or less 

 roundly excised in the hind margin, 

 and here bearing long, black hairs; 

 the ventral lamella is brownish pruinose like the segments. The geni- 

 talia are generally yellowish haired above, black haired below, there 

 are especially strong, black hairs on the lower forceps. Legs black 

 and ferrugineous ; coxæ greyish pruinose with long, pale yellowish 

 hairs; femora black, the apex and a dorsal, somewhat backwards 

 lying stripe ferrugineous, the stripe generally occupies more or less 

 of the apical half of the posterior side on the anterior femora; tibiæ 

 generally rufous with exception of the ventral side and the apex; 

 sometimes they are nearly quite rufous; metatarsi and the base of 

 the next joint ferrugineous, the other joints black; the ferrugineous 

 colour often much more restricted, and often very dark. The short 

 hairs on the legs yellowish, only black on the dorsal side of the tibiæ, 

 but varying to being nearly all black; long, thin hairs are found on 

 the ventral and posterior sides of the front femora, on the ventral 

 side of the posterior femora and on the ventral side of the anterior 

 tibiæ; they also vary in colour from pale to more or less black, 

 but on the tibiæ they are generally black. Spine-like bristles are 

 found on the postero-dorsal side of the front femora towards the 

 apex, on the ventral and front sides of the posterior femora, on the 

 dorsal and posterior sides of the front tibiæ and on the various sides 

 of the posterior tibiæ with exception of the posterior side of the hind 

 tibiæ, iinally some are found apically on the posterior femora; on 

 the posterior side of the front tibiæ they are long; all the spine-like 



