SUBFAMILY I. I'llAXKUOI'TKKI X.K. 463 



what species was previously referred to by any writer. Mr. Scud- 

 der in his Monograph ( 1S!)S ) finally brought order out of chaos 

 and fixed the present standing of most of the species. The genus 

 was later again monographed by K. & H. (1914a), and of the 11 

 species and three varieties recognized by them, six species and 

 two varieties are herein treated as occurring in the eastern states 

 and Canada. The females are very similar and difficult to sepa- 

 rate unless taken with the males in the field. The following key 

 is therefore based mainly upon the latter sex. 



KKY TO EASTERX SPECIES OF SC'UDDERIA. 



. Last dorsal abdominal segment of male subtriangular, without an 

 elongate, decurved median process; subgenital plate not compressed 

 toward apex; cerci long, slender, tapering (Fig. 153, h)\ tegmina 

 rather broad, dull, with swollen veinlets; ovipositor with both mar- 

 gins curved, not bent, more than half as long again as pronotum 

 (Fig. 153, a.) 211. SEPTENTBIOXALIS. 



aa. Last dorsal segment of male with an elongate, median, decurved pro- 

 cess either notched or forked at tip (Fig. 152, a, g); subgenital 

 plate narrowed and compressed towards apex; cerci shorter, very 

 strongly incurved (Fig. 153, i,) their apical third thickened; ovi- 

 positor bent as well as curved, distinctly less than half as long again 

 as pronotum. 



b. Apex of decurved process of male not distinctly and deeply 

 forked as shown in Fig. 152, h, but either with a very wide and 

 shallow or a narrow median notch. 



c. Notch of dorsal abdominal process of male subquadrate, with 



a minute median tooth, the notch as wide as the middle of 



the upturned subanal plate and embracing the sides of the 



latter when in natural position, its lateral processes slender 



and compressed (Fig. 152, a, b); ovipositor suddenly and 



strongly bent upward, its base distinctly broader than the 



middle (Fig. 153, b.) 212. TEXENSIS. 



cc. Notch of dorsal abdominal process without a median tooth, 



much narrower than the subgenital plate and touching only, 



not embracing, the upcurved subanal plate (Fig. 152, c, f.) 



(I. Tegmina usually distinctly wider than length of pronotum, 



not striped with dark brown; ovipositor less suddenly bent 



upward and (except in strigata) not wider at base than at 



middle. 



e. Lobes or lateral processes (each side of notch) when viewed 

 from above, narrow and distinctly tapering apically; teg- 

 mina wide, not over four times longer than the middle 

 breadth; ovipositor sharply bent upward, its base and 

 middle subequal in width (Fig. 153, c.) 213. PISTILLATA. 

 ee. Lobes or lateral processes of notch well rounded, subequal 

 in width, their margins thinner; tegmina usually no 

 broader than depth of body, nearly or more than five 

 times longer than the middle breadth. 



