58 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



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

 narrow ; b. n. strongly bent at beginning of cubital nervure ; t. ni. 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 9J 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 /x: — 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. — ^o. 2035, Miis. 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. 



