1916] Synopses of Zodion and Myopa 193' 



12. Thorax not plainly striped; western species 13 



Thorax more distinctly striped -14 



13. Legs mostly dark, abdomen wholly dark triste 



Legs pale, last abdominal segments pale obscurum 



14. Proboscis from palpi to tip fully twice the head height ; abdomen pale m 



male, Western species reclusum 



Proboscis not so long^ ; • • ■ ^^ 



15. Thorax gray, with two or three dark stripes above beside lateral spots; 



ventral plate broad and low fulvifrons 



Thorax brownish, with four or five dark stripes, beside lateral spots; the 

 intermediate stripes distinct only in front 16 



16. Ventral plate fully twice as long as broad, abdomen of female very slender 



and compressed; male with pale abdomen perlongum 



Ventral plate shorter ;^1' 



17 Ventral plate much broader than long; the striated dark area behmd also 



broad ^«>'^ 



Ventral plate as long as broad 18 



18. Ventral plate about one and a half times as long as broad, Eastern species. 



intermedium 

 Ventral plate about as long as broad. Western species occidentale 



Zodion fulvifrons Say. 



Say says that the thorax has two distant brown lines. This 

 plainly agrees only with Z. ahitns Adams; the first posterior 

 cell varies from open to closed. I have therefore no hesitation 

 in considering Z. abitiis a synonym of the true Z. fulvifrons. 

 Z. rufifrons Macq. was from Philadelphia. He says the thorax 

 with "nuance de cendre argente" which will apply far better to 

 Z. fulvifrons than to any other Eastern species. The rest of his 

 description will fit any of our Eastern species. Z. fulvifrons has 

 the ventral plate low, and much broader than long. 



Zodion perlongum Coq. 



Described from the West, it occurs here in Virginia. The 

 long, compressed abdomen, and the very long ventral plate will 

 distinguish the female. What I beheve is the male has a rather 

 pale abdomen. Mr. Greene has taken it at Broomall, Pa. 

 Most of the specimens are taken in September. 



Zodion intermedium n. sp. 



Face whitish, antennse reddish, front fulvous, in some specimens 

 much darkened on the vertex and the dark reaching forward in a 

 forked stripe; thorax above brown, with four black stripes, the inter- 

 mediate pair only in front, the sublateral pair not extending forward, 

 lateral spots, and transverse suture often black; metanotumdull black. 

 Abdomen black, yellowish gray pollinose, especially on sides and a 

 middle stripe; legs pale, femora dark above, last tarsal joint black; 

 wings rather yellowish on base, veins beyond base dark. Vertex, 

 thorax, abdomen and legs clothed with black hairs. Proboscis beyond 

 palpi about one and one-half times as long as head-height. Ventral 



