1921] NATURAL SCIENCES OF PHILADELPHIA. 41 



returned to Iquitos. Here I accepted the invitation to accompany 

 a prospector who was going up the Napo River. We left Iquitos 

 at about three o'clock one afternoon in a small canoe. Our party 

 consisted of five, including the Indian paddlers. The first night, 

 after supper, I got out ray collecting apparatus, consisting of a white 

 sheet, lamp, cyanide bottles and net, and after fixing the sheet and 

 lighting the lamp, I was ready for the insects. They started to 

 come in twos and threes, but in about ten minutes they came so 

 fast that I had to call my prospector friend to my assistance. Even 

 then they were in such numbers that we could not get them all. 

 It took me all of the next day to pin and paper this material. Each 

 succeeding night while on the Napo River, I was able to add numer- 

 ous specimens to my collection. The animal life, especially the 

 birds and fishes, was extremely abundant. I was very sorry when 

 the time came to leave this place and return to Iquitos. From 

 here I. caught the river steamer down the Amazon and returned 

 to Canada after an absence of more than a year." 



The Facies of the Amazonian Tipulid Fauna. 



The known Amazonian crane-flies represent a comparatively large 

 number of species distributed in a few relatively large genera. The 

 tribes and subfamilies of the Tipulidae found here are the»Limno- 

 biini, Hexatomini, Eriopterini and Tipulinae. The families Tany- 

 deridae, Ptj^chopteridae and Rhyphidae, and the Pediciini and 

 Cylindrotominae of the Tipulidae, have not been discovered in 

 Amazonian territory. The following genera are comparatively well 

 represented in number of species: Dicranomyia, Geranomyia, Rhi- 

 pidia, Gonomyia, Erioptera, Gnophomyia, Trentepohlia, Psaronius, 

 Polymer a, Ozodicera and Brachypremna. Other genera that are 

 very characteristic of this general region, although more scantily 

 represented in number of species, are as follows: Rhamphidia, 

 Diotrepha, Ceratocheilus, Toxorhina and Lecteria. The following 

 genera and subgenera appear to be confined to the Amazonian 

 and Guianian sub-regions: Molophilus (Eumolophilus) , CtenoUrn- 

 nophila, and Microtipula. A few genera in the Amazonian region 

 have been taken as yet only on the Upper Amazons in Peruvian 

 territory; these are as follows: Elephantomyia, Cryptolabis and 

 Orimarga. 



Genus GERANOMYIA Haliday. 

 1833. Geranomyia Haliday, Ent. Mag., vol. 1, p. 154. 



The very large and complex genus Geranomyia finds its center 

 of distribution in the Neotropical Region. Many species are widely 

 distributed but others seem to be rather local in their range, this 



