1898.] NATURAL SCIENCES OF PHILADELPHIA. 181 



Legs. — Color: Yellowish-brown. Bristles: Fore-leg, femur, as 

 usual. Tibia, lateral flexor row has one large bristle at the junction 

 of the middle and apical thirds, mesal extensor row has from four 

 to six rather small bristles about equal and equi-distant, extending 

 from very near the base to very near the apex. Middle leg : Femur, 

 as usual, but the anterior median row is represented by only one 

 bristle of good size which is situated just at the middle of the femur. 

 On the whole, the bristles of this femur are rather few. Tibia : An- 

 terior surface, one large bristle at junction of apical and middle 

 thirds ; posterior surface two, rather smaller at junction of basal and 

 middle, and middle and apical thirds respectively; flexor surface 

 one, rather small at junction of apical and middle thirds. Hind'leg : 

 Femur, as usual. Tibia, mesal extensor row has usually two promi- 

 nent but not very large bristles situated respectively at the junction 

 of the basal and middle, and middle and apical thirds (sometimes 

 the former is absent) ; lateral extensor row has a considerable but 

 varying number of unequal but almost equidistant bristles extend- 

 ing from base to apex ; lateral flexor row is represented by only 

 one bristle situated at the junction of the apical and middle thirds. 



Genus SOMALIA. 



There is but a single specimen, and that a female of the species 

 on which I found this new genus, but the characters are so pro- 

 nounced that I have no hesitation in so doing. In the table of 

 Brauer & Bergenstamm 3 this genus would fall in the group with 

 Dasyphora, except that it has but one large orbital bristle. It dif- 

 fers, however, from Dasyphora in several points: (1) the sterno- 

 pleural bristles have the arrangement 2-1, instead of 1-3 ; (2) there 

 is a row of bristles on the hypo-pleura ; (3) the third joint of the 

 antenna is much shorter as compared with the second ; (4) the out- 

 line of the arista as a whole is much narrower, and its hairs are less 

 closely set; (5) the eyes are only minutely hairy with a magnifica- 

 tion of twenty diameters; (6) the post-vertical bristles are very 

 small, while in Dasyj)hora they are large. 



In Girschner's classification the new genus stands far away from 

 Dasyphora in the 6th or 7th group of his Tacbinidse. 



Somalia enigmatica nov. sp. 



One female, taken October 11, 1894. 



' Vorarb. zu Monog. Muse. Schiz., Part III, p. 90 et seq. 



