PREFACE. 



Alo 5ft /j.7] 8vg%£P<xlvsiv rtouScxwj trv rLtai 7u>v atifxotipuiv' £d>u)V \rti- 

 cxt^iv. Ev rtdat yap tots tyva(,xot,$ tvtatb n ^tav/xaorov' xai xa^artep 

 H^axTiftroj hiystat rtpog Tfov? %svov$ slntcv ?ov$ fiovho/xsvovs ivrvxtiv 

 av?(ji, bi srtsidr] rtpocHcWfj tl8ov avtov ^spdfisvou rtpoj ta Xitv<$ eatrjoav 

 (txihsvs yap avtov? siouvai ^tappovvt a$' tlvac yap xal wra-u^a §sov$^), ovtut 

 xai rtpoj trjv ^r t tviOiv rtepi txdotov tup ^ajcov rtpoadvai, btl fxyj bvourt.ovp.tvov 

 w? sv artaacv ovfos ttvbs <pvocxoi> xai xa%ov. 



(Wherefore we ought not childishly to neglect the study even of the 

 roost despised animals, for in all natural objects there lies something 

 marvellous. And as it is related of Heraclitus that certain strangers who 

 came to visit him, when they found him warming himself at the kitchen- 

 fire, stopped short — he bade them enter without fear, for there also were 

 the gods : so we ought to enter without false shame in the examination 

 of all living beings, for in all of them resides something of nature and 

 beauty.) 



Aeistoteles, de partibus animalium, I, 5. 



The present volume contains the first part of a monograph of 

 the North American Tipulidae, that is, the Tipulidae brempalpi, 

 the Cylindrotomina, and Ptychopterina. The Tipulidae longi- 

 palpi are reserved for another volume. 



The ground covered in this monograph is the same as that of 

 my former essay : New genera and species of the North American 

 Tipulidae with short palpi, with an attempt at a new classification 

 of the tribe (in the Proceedings of the Academy of Natural Sci- 

 ences of Philadelphia, 1859), that is, it embraces all the known 

 North American species, 1 at the exclusion of those from the West 



1 The described species belong to the Atlantic States of the Union ; only 

 two Califorman species have been added. 



(in; 



