206 CONNECTICUT GEOL. AND NAT. HIST. SURVEY fBull. 



month or so, but some have a more extended flight period. In some 

 species this is due to their having two generations per season, the 

 first appearing in Spring or early Summer, the second in late Summer 

 or Autumn. 



Figures. The figures herein supplied have been chosen from 

 a wealth of material. The wing venation of each genus and sub- 

 genus is illustrated, together with that of certain other species that 

 deviate in important regards from the genotype. Where such species 

 have macrotrichia in the wing-cells, these are indicated by circular 

 dots to represent the position of the setigerous punctures. No attempt 

 has been made to show the wing pattern, eminently characteristic of 

 manv species Avith variegated wings. For the local species, most of 

 these have been shown in an earlier report by the writer (The Crane- 

 flies of New York, Part I, Cornell Univ. Agr. Expt. Sta. Mem. 

 25:765-993, text-figs. 121-132, pis. 30-55; 1919, abbreviated in this 

 report as "Cfls. N. Y., 1"), which should be used in conjunction with 

 the present paper. For further convenience of reference, all other 

 readily available figures have been cited, in conjunction with the 

 various species. The figures cited, with those supplied as original 

 at this time, should aid materially in the identification of these flies. 



Special emphasis is here placed on the structure of the male 

 hypopygium, which furnishes almost the sole available specific char- 

 acters in many groups. Such figures are somewhat diagrammatic 

 outlines to show details and position of parts. Mounts for preserving 

 the genitalic structures are easily made in the following manner: 

 The apex of the abdomen is removed and placed in cold KOH, 10 

 percent solution, overnight. After thorough washing, dehydration 

 and clearing in xylol, permanent slide mounts may be made in dam- 

 mar or balsam. 



Connecticut Collections and Acknowledgments 



The records of Tipulidae for the State List have been derived 

 from a variety of sources. One of the largest single series is that of 

 the Connecticut Agricultural Experiment Station, amassed during a 

 long period of years by the various members of the staff, under the 

 leadership of Doctor Britton, and indicated in this report by the 

 collector's mitials. A second major series is that of the University of 

 Connecticut (Connecticut State College), collected by Professors de 

 Coursey and JNIanter, together with their various students in entomol- 

 ogy. ]\Iost of these latter records are indicated by the initials, C. S. C. 

 (Connecticut State College). 



The numerous records secured by the late Mr. Charles W. John- 

 son and collaborators (Occas. Papers Boston Soc. Nat. Hist., 7: 1-326; 

 1925) have been included. A small collection from near Avon was 

 taken by Dr. C. H. Curran. The majority of the specimens discussed 

 herewith have been taken by Dr. G. C. Crampton. Mrs. Alexander, 

 and myself during the course of many trips into the State during 

 the years 1928 to 1933. One notable excursion 2iiade by us (June 8-9, 



