MAY FLIES AND MIDGES OF NEW YORK 259 



Genus 40. Camptocladius V. d. Wulp 

 Tijdschr. v. Entomol. XVI (LXX) ; XVII, 133 

 Resembles in most respects Cricotopus; the fore meta- 

 tarsus is shorter than its tibia; the anal segment of the male is 

 short and broad, the claspers white with white hairs. Legs nni- 

 colored, at least not white and black annulate. The halteres of 

 most of the known species are dark. Wings bare, R^^.^ is bent 

 upwards, sometimes short and ending noticeably before the end 

 of the costa, or running close to it for a distance, the cell R^+s 

 therefore quite broad; the crossvein usually on or proximad of the 

 mid length of the wing; the cubitus forked, the base of the fork 

 usually noticeably distad of the crossvein ; the lower branch sinuous 

 (pi. 30, 11,gs. 1 to 4) . Usually small black species from 1.5 to 3 mm. 

 in length. In other respects like Chironomus. 



The larvae of some species have been f oundi in dung. Accord- 

 ing to Arribalzaga the palpus in O a m p t a el a d i u s has but 

 one joint; in all the species that I have seen there are four joints 

 as in O h i r a n m u s . 



KEY TO SPECIES OF CAMPTOCLADIUS 



Imagines 

 a Thorax with more or less yellow 

 6 Abdomen and thorax yellow, the latter with three wide blackish lines ; 



wings slightly hairy (Greenl. ) 1. graminicola 



hT) Abdomen pale fuscous, or fuscous 



c Anterior crossvein is about one third the wing length from the base ; 

 thorax yellow, black-striped; abdomen pale fuscous, more yellow- 

 ish anteriorly ; legs yellow ; length 1.5 mm. ; female 



2. Camptocladius sp. 

 cc Anterior crossvein is two fifths wing length from the base ; abdomen 



fuscous ; length 2 mm 3. f u m o s u s n. sp. 



aa Thorax wholly black 



1) The crossvein is noticeably proximad of the fork of the cubitus 

 c Fore metatarsus about one third shorter than its tibia 



d Ri^f-j not parallel to the costa, the cell above it quite distinct; 



wings hyaline, whitish ; length 2 mm 4. aterrimus 



del Ri-f-s long, and curves so as to be nearly parallel to the costa, 

 nearly obliterating the cell above it, especially toward the apex ; 

 wing often with a slightly smoky tint; body subshining; no 

 black dash at the base of the wing ; length 1.5 mm. 



7. minimus 

 cc Fore metatarsus about one half as long as its tibia 



d Fore legs pubescent, middle and hind ones sparsely short pilose; 

 palpi black, thorax black, lightly cinereous, with two rows of 

 yellowish hairs; wings white; length 1.75 to 2.25mm. (Green- 

 land) ',5. pumilio 



dd Not as described above 



