306 MAINi; AGRICULTURAL EXPERIMENT STATION. I9II. 



20. Genus Cordyla Meigen. /7 

 Illiger's Magazine II. 262. 1803; Klass. i. 93. 1804. 

 Polyxena. Nouv. Class. Mouches. 16. 1800. (Without type). 

 Front broad ; eyes oval, ocelli small, 2 in number ; contiguous 

 to the eye margin; antennae projecting forward, 2+9, 2-\-i0, 

 2+12, 2-I-13, or 2+14 jointed, very short, but little longer than 

 the height of the head, the joints shorter than broad, disk-like, 

 closely sessile in dried specimens; palpi 4-jointed, basal joint 

 small, second much enlarged, thickened (Fig. 54 Part I), third 

 and fourth slender, almost filiform. Abdomen compressed, 

 hypopygium of male small and inconspicuous. Legs slender, 

 lateral set?e of hind tibiae shorter than the diameter of the tibia 

 at the widest part; posterior basal seta of hind coxa wanting. 

 Costa of the wing does not extend beyond the tip of Rs ; sub- 

 costa very short, curved toward Ri ; media forks distad of the 

 basal section of Rs ; its posterior branch usually not reaching 

 the wing margin (Figs. 224-228). The larv?e live in decaying 

 wood and in fungi. 



Table of species. 

 a. Males. 



b. Antennae 2+13 jointed. 



c. Yellowish species, dorsum of thorax and end of abdomen 



darker; cubitus forks distad of the middle of petiole of 



media. i. manca n. sp. 



cc. Fuscous species; cubitus forks proximad of middle of petiole 



of media. 2. scita n. sp. 



bb. Antennae 2+12 or 2+10 jointed. 



c. Antennae 2-t-l2 jointed ; abdomen wholly fuscous. 3. vohtcris. 

 cc. Antennae 2-\-io jointed. 



d. Humeri yellow; hypopygium as figured (Fig. 118); eastern 



species. 4. recens n. sp. 



dd. Humeri dusky; hypopygium as figured (Fig. iiq") ; western 



species. S. neglecta n. sp. 



aa. Females; antennae 2-4- g and 2+10 jointed. 



b. Antennae 2+10 jointed; thorax and abdomen fuscous. 



3. volticrls. 

 bb. Antennae 2+9 jointed. 



c. Cubitus forks about opposite proximal end of the crossvein ; 

 thorax and abdomen shining dark reddish brown. 6. C. sp. 

 cc. Cubitus forks at or distad of middle of petiole of the media, 

 d. Wing over 5.5 times as long as the fore tibia. 7. C. sp. 



dd. Wing less than S times as long as the fore tibia. 



