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BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



of the stigma, much thickened and appearing black ; marginal cell long and quite 

 narrow; b. n. strongly bent at beginning of cubital nervure ; t. m. opposite b. n., 

 the latter very slightly more basad ; only one s. m., which is considerably broader 

 than the first discoidal ; first r. n. meeting first t. c, which is continued in a straight 

 line with it, making, with the cubital nervure, a large X • This interesting genus 

 differs from those hitherto known by the combination of an elongated prothorax, 

 unarmed hind femora, and sessile abdomen. 



Protostephanus ashmeadi, sp. nov. 



Length about 9£ mm. ; anterior wings clear, with brassy iridescence still show- 

 ing, their length about 6 mm. ; hind coxae transversely striate ; hind tibiae 

 claviform, swollen apically, the hind tibiae and tarsi about as long as hind coxae 

 and femora, but the tibiae somewhat longer than the femora ; pleura finely striate ; 

 measurements in /j.: — width of head about 1500; length of thorax anterior to 

 wings about 1200 ; length of hind coxae about 1200 ; width of hind tibiae at apex 

 about 450 ; breadth of hind femora about the same ; extension of abdomen beyond 

 apex of hind femora perhaps 1500; breadth of stigma about 180; breadth of 

 marginal cell about 300; length of first (and only) s. m. 975; length of first dis- 

 coidal, 900 ; length of the quadrate second discoidal about 795 ; length of t. m. not 

 quite 300 ; length of second section of b. n. (bounding first discoidal) about 450. 



Type. — No. 2035, Mus. Comp. Zool. Florissant, Col. (No. 13913, S. H. 

 Scudder Coll.). Named after Mr. W. H. Ashmead, whose writings were most 

 useful in determining the ..affinities of the insect. 





