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XVI. Dicranota ; a carnivorous Tipulid larva. By Prof. 
Louis Compron Miaun, F.R.S. Communicated by 
the Rev. Canon Fowter, M.A., F.L.S., &e. 
[Read May 10th, 1893.] 
PLATES) Xe.) MET & XE, 
Introduction. 
Habitat and Life-history. 
The External Features of the Larva. 
The Larval Epidermis. 
The Nervous System of the Larva. 
The Body-wall and Ccelom of the Larva. 
The Alimentary Canal of the Larva. 
The Circulatory Organs of the Larva. 
The Respiratory Organs of the Larva. 
The Pupa. 
The Fly. 
Development of the Fly. 
Introduction. 
Many dipterous insects are hitherto known only in 
their final or winged state. The imperfect condition of 
our knowledge of the earlier stages is apt to be very 
embarrassing to the naturalist who comes across some 
dipterous larva whose habits or structure excites his 
curiosity. ‘To fill this gap, one of the most considerable 
in Entomology, will require the efforts of more than one 
generation of students. The present sketch, which will, 
I hope, be followed by others, may, in the present 
dearth of information, be of some use to those who 
occupy themselves with this branch of Natural History. 
An excellent general account of the family (Tipulide),* 
to which Dicranota belongs, will be found in part iv. of 
Baron Osten Sacken’s ‘Diptera of North America;’t and 
* The family of Tvpulide, which is often made to include all 
the Tipulariz or Diptera Nemocera, is here used only for Latreille’s 
Tipulariea terricole or Meigen’s Tipularie rostrate. 
+ Smithsonian Mise. Coll., vol. viii. (1869). See also ‘ Studies 
on Tipulide,’ by the same author. Part I. Tipulide longipaipi, 
1886; Part Il. Tipulide brevipalpi, 1887. (Berliner Entomolog. 
Zeits., Bde. xxx. xxxi.). 
TRANS. ENT. SOC. LOND. 1898. 
PART III. (SEPT.) 
