THe CRANE-Furrs oF New York — Part II 749 
is found in all forms with the capsule compact and massive, and is even 
preserved in many species with the dissected capsule. In many cases, 
however, it is firmly fused with the internal-lateral plates; or, in some 
cases, all the plates of the capsule are firmly united and their individual 
limits are ill-defined. In the generalized forms the clypeus and the 
labrum are entirely distinct from each other, while in other forms the two 
lose their individuality by fusion. 
The sclerites of the generalized primitive head bear’ bristles, or setae, 
of various types and arrangement. In the Tanyderidae the punctures 
are multisetose; in most Ptychopteridae the setae are branched or some- 
what plumose. 
The literature on the head capsule and the mouth parts is as follows: 
Ptychoptera. De Meijere, 1916: 188-191, figs. 14-20. 
Bittacomorpha. Hart, 1898 [1895]: 192, pl. 5. 
Trichocera. De Meijere, 1916:191-194, figs. 21-23. 
Limnobia. De Meijere, 1916: 198-201. 
Dicranomyia. De Meijere, 1916: 197-198, figs. 32-35. 
Dicranoptycha. Alexander, 1919b:71, figs. 2, 3. 
Elliptera. Mik, 1886b:339, pl. 6. 
Ula. Alexander, 1915a:5-6, pl. 1. 
Dactylolabis. Mik, 1894:261-266, pl. 2; Nowicki, 1867:341 (as Rhicnoptila). 
Limnophila. De Meijere, 1916: 204-206, figs. 49-51. 
Eriocera. Alexander and Lloyd, 1914:21-22, pl. 1. 
Hexatoma. Alexander, 1915¢:146, pl. 1. 
Penthoptera. Alexander, 1915¢:155, pl. 1. 
Tricyphona. De Meijere, 1916:195-196, figs. 29-31. 
Pedicia. Needham, 1903:286, fig. 19. 
Dicranota. Miall, 1893: 237-238, pl. 10. 
Ormosia. De Meijere, 1916:201—204, figs. 37-47. 
Gnophomyia. Malloch, 1915-17 b: 230-231, pl. 34, fig. 10. 
Chionea. Brauer, Egger, and Frauenfeld, 1854:614, pl. 11. 
Phalacrocera. Miall and Shelford, 1897:344-345; Bengtsson, 1897. 
Cylindrotoma. Cameron, 1918. 
Liogma. Miggenhberg, 1901; Alexander, 1914:111, pl. 1. 
Ctenophora. Anthon, 1908: 544. 
Prionocera. Malloch, 1915-17 b:199, pl. 32, figs. 1-3. 
Holorusia. Comstock and Kellogg, 1904:55, 61-62. 
Tipula. Vimmer, 1906, and 1911: 1-6. 
In addition to the preceding, the genera Helobia (Beling, Hart, Malloch), Rhaphidolabis 
(Needham), and Tanyptera have been discussed less fully. 
All of the above-named genera are considered in this paper, and the 
head capsule and mouth parts of the following genera are described 
also: Protoplasa (supposition), Bittacomorphella, Rhipidia, Rhamphidia, 
Antocha, Epiphragma, Pseudolimnophila, Pilaria, Ulomorpha, Elephant- 
omyia, Teucholabis, Gonomyia, Erioptera, Molophilus, Adelphomyia 
