THE CRANE-FLIES 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, pi. 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, 1919 b: 71, figs. 2, 3. 

 Elliptera. Mik, 1886 b: 339, pi. 6. 

 Ula. Alexander, 1915 a : 5-6, pi. 1. 



Dactylolabis. Mik, 1894:261-266, pi. 2; Nowicki, 1867:341 (as Rhicnoptila). 

 Limnophila. De Meijere, 1916:204-206, figs. 49-51. 

 Eriocera. Alexander and Lloyd, 1914:21-22, pi. 1. 

 Hexatoma. Alexander, 1915 c: 146, pi. 1. 

 Penthoptera. Alexander, 1915 c: 155, pi. 1. 

 Tricyphona. De Meijere, 1916: 195-196, figs. 29-31. 

 Pedicia. Needham, 1903:286, fig. 19. 

 Dicranota. Miall, 1893: 237-238, pi. 10. 

 Ormosia. De Meijere, 1916:201-204, figs. 37-47. 

 Gnophomyia. Malloch, 19 15-17 b: 230-231, pi. 34, fig. 10. 

 Chionea. Brauer, Egger, and Frauenfeld, 1854:614, pi. 11. 

 Phalacrocera. Miall and Shelf ord, 1897:344-345; Bengtsson, 1897. 

 Cylindrotoma. Cameron, 1918. 



Liogma. Miiggenberg, 1901; Alexander, 1914: 111, pi. 1. 

 Ctenophora. Anthon, 1908:544. 

 Prionocera. Malloch, 19 15-17 b: 199, pi. 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 



