3. Diptera-Tipulidae from Juan Fernandez. 
By 
Dr. CHARLES P. ALEXANDER, Urbana, Illinois. 
The crane-flies collected by Mr. K. BACKSTROM during the Swedish Ex- 
pedition to the Juan Fernandez Islands 1916—17, were kindly sent to me for 
determination by Prof. Y. SJOSTEDT. There were but two species included in 
the material but neither of these seem to have hitherto been found on the 
adjacent mainland. The occurence of a species of 7zfu/a on one of the lesser 
oceanic islands at this distance from the coast of South America is of very 
considerable interest. 
Family Tipulidae 
Subfamily Limnobiinae 
Tribe Limnobiini 
Genus Dicranomyia Stephens 
Dicranomyia selkirki, sp. n. 
General coloration dark brown, the mesonotal praescutum reddish brown; 
antennae black; wings brown, the stigma darker brown; vein Sc short, cell 
I st MM, closed. 
Female. — Length 7,,—9 mm.; wing Io—I1,8 mm. 
Rostrum brown, the palpi dark brown. Antennae black, the flagellar seg- 
ments rounded-oval. Head brown. 
Mesonotal praescutum dark reddish brown, in some specimens with clearer 
reddish stripes of which the median one is split by a capillary brown line; 
remainder of the mesonotum dark brown. Pleura dark reddish brown. Halteres 
moderately elongated, the knobs dark brown, the stems paler. Legs with the 
coxae reddish brown; trochanters dark brown; remainder of the legs brown, 
darkest on the tarsi; claws with a large, rather blunt, tooth at about mid- 
length, with a series of about four much smaller teeth nearer the base. Wings 
strongly suffused with brown, the stigma still darker brown, rectangular; veins 
dark brown. Venation: Sc, ending just beyond the origin of Rs, Sc, removed 
some distance from its tip so that Sc, alone is about equal to be basal de- 
