Oil new or Uttle-knoion Tipulidse. 309 



species except by the abseuee of the two reddish-orange 

 bands on the anterior segments. It also bore stolons, and 

 he considered it a variety of this species. 



Allen found the breeding-season from March to June at 

 Plymouth. 



Autolijtus Ingens, De St. Joseph, from Plymouth {Allen), 

 has a comparatively small head, surmounted by a massive 

 median tentacle, the lateral tentacles being much smaller. 

 Four eyes. The body is small, but typical ; the proboscis 

 has only six denticulations. The proventriculus has twenty- 

 six to thirty rows of grey points and occupies segments 8-11. 



This is one of several of the Syllids which requires 

 re-investigation, since it may be connected with other known 

 forms. De St. Joseph met with specimens having male 

 buds. Allen observed early stolons in January and February 

 at Plymouth, and a well-developed one in July. 



Six specimens of Procerastea halleziana, Malaquin, were 

 procured amidst Ascidians from a raft moored in Caw- 

 sand Bay, Plymouth, in September {Allen). A brief, but 

 excellent, summary of the stolonisation of this form is 

 given by Mr. F. Potts'^ along with other types of repro- 

 duction in the Syllids. Ixii Procerastea halleziana, ^% ^\io\yn 

 by Malaquin, the twelve to fifteen new segments are inter- 

 calated in the middle of the stock, and not at the posterior 

 end as usual in the Syllids. Thus there may be in front 

 twenty to twenty-two original segments, fourteen to sixteen 

 of recent formation, and then eighteen to twenty more of 

 the original stock, the middle showing the more advanced 

 development of the foot.- The head of the stolon is formed 

 on the fourteenth segment. The parts soon assume the 

 condition of the adult. Dr. Allen has a further com- 

 munication on this subject lately, an abstract of which 

 appeared in the notice slip of the Royal Society (1921). 



XXVIII. — Ntiu or little-known Tipulidae (Diptera). — VI. 

 Ethiopian Species. By Charles P. Alexander, Ph.D., 

 F.E.S., Urbana, Illinois, U.S.A. 



The material considered in the present instalment was 

 received for study from the Carnegie Museum in Pittsburg, 

 through the kindness of the Director, Dr. W. J. Holland, and 



* Spengel's ' Ergebuisse und Fortscliritte Zoologie,' Bd. iii. p. 30. 



