336 Dr. C. P. Alexander on African Crane-flies 



Fig. 9. First lamella of mandible. X 350. 



Fit/. 10. Left preliensor with part of presternum, ventral view, x 30. 



Fig. 1 1 . Impression of tenth sternite. x 75. 



Plate XII. 

 Mecistocephahis apator, sp. n. 



Fig. 1. Head in outline, dorsal view, x 30. 



Fig. 2. Median region of labrum. x 195. 



Fig. 3. Maxilla?, ventral view, x 60. 



Fig. 4. First lamella of mandible, x 380. 



Fig. 5. Right preliensor and part of prosternum, ventral view, x 45. 



Fig. 6. Caudal end, dorsal view, x 45. 



Mecistocephalus monticolens, sp. n. 



Fig. 7. Head in outline, dorsal view. X 30. 



Fig. 8. Anterior region of head, ventral view, the maxillae removed. 



X 45. 

 Fig. 9. Median region of labrum. X 195. 



Fig. 10. Left preliensor and part of prosternum, ventral view, x 45. 

 Fig. 11. Impression on tenth sternite. X 45. 



XXXIX. — Undescribed Species of African Crane-flies in the 

 Collection of the British Museum {Natural History) •. 

 Tipulidae, Diptera. — Part I. Subfamily Limnobiinae. By 

 Charles P. Alexander, Ph.D., Urbana, Illinois, U.S.A. 



[Concluded from p. 44.] 



Trentepohlia (Trentepohlia) Uganda, sp. n. 



Mesonotal prpescutum reddish brown with three darker 

 brown stripes ; pleura dark brown ; halteres pale ; legs 

 brownish yellow, the posterior tibiae with four long bristle- 

 like hairs near the tip ; wings yellowish with a solid dark 

 area at the cord and another in the apical radial cells of the 

 wing ; abdomen dark brown, the basal segments indistinctly 

 ringed with paler. 



Female. — Length about 9 mm. ; wing 8" 7 mm. ; hind 

 femur 11*8 mm. ; tibia 1P5 mm. ; tarsus 7 mm. 



llostrum and palpi dark brown. Antenme dark brown. 

 Head dark brown, sparsely grey-pruinose. 



Pionotum dark brown. Mesonotal prasscutum light 

 i eddish brown, with three darker brown stripes, the lateral 

 stripes less distinct than the median stripe ; lobes of the 

 scutum, scutellum, and postnotum dark brown. Propleura 

 reddish ; mesopleura and sternum dark brown. Halteres 



