The Crane-Flies of New York — Part I 899 



life is spent presumably in damp earth, a very different habitat from that 

 of the closely related genus Elephantomyia. The following key divides 

 the local species: 



Cell I'st M2 closed; bodv coloration brownish yellow; she, wing 6.5 mm. [Toxnrrhina magna 

 0. S. Proc. Ent. Soc. Phila., vol. 4, p. 232. 1865.] (Plate XXXIII, 45.) 



T. mxujna (0. S.) 



Cell 1st Mz open by the atrophy of the medial cross-vein (closed in abnormal specimens 

 only); body colon-^tion gray; size smaller, wing less than 5.5 mm. [Tnxorrhina niuliebris 

 O. S. Proc. Ent. Soc. Phila., p. 233. 1865.] (Plate XXXIII, 46.) . . T. muUehris (O. S.) 



The small T. niuliebris is northern in its distribution, while the larger 

 T. magna is much more southern. 



Genus Atarba Osten Sacken 



1869 Aiarba 0. S. Mon. Dipt. N. Amer., part 4, p. 127-128. 



A small number of species (about eight) are included in the genus 

 Atarba, most of them belonging to tropical South America. In many 

 of the species, including the local A. picticornis, the antennae of the male 

 are elongated and beautifully annulated with yellow and brown. As has 

 already been pointed out by the author a number of times, many of the 

 species of crane-flies described by various workers as species of Atarba 

 are in reality members of the aberrant eriopterine genus Gonomyia, 

 subgenus Leiponeura (Alexander, 1916:508-509). 



Atarba picticornis O. S. 



1869 Atarba picticornis 0. S. Mon. Dipt. N. Amer., part 4, p. 128-129, pi. 1, fig. 13. 



Atarba picticornis is a rather common species, in suitable localities, 

 flying in late June and July. The adult is reddish yellow; the antennae 

 are yellow with the apical half of each flagellar segment dark brown; 

 the abdomen is yellow with a black ring before the tip; the wings are pale 

 yellow. Sc is short, the cross-vein r lacking; cell 1st AU is small, with the 

 basal deflection of Cui inserted at its base (Plate XXXIII, 47). 



Genus Antocha Osten Sacken 



1859 Antocha 0. S. Proc. Acad. Nat. Rci. Phila., p. 219. 



The small genus Antocha includes about seven described species in 

 the Northern Hemisphere. The immature stages are strictly aquatic, 

 the pupae having branched pronotal breathing horns as in Simulium. 



