110 THE CANADIAN ENTOMOLOGIST. 



Papaipema silphii, n. sp, 



Ground colour smoky umber brown with whitish to purplish 

 grey powderings on thorax and primaries. Head and vestiture of 

 thorax show ground colour deeply, the long scales tipped white 

 and the border of collar often so defined; antennae of male heaviest 

 and show minute ciliations, no conspicuous white scales at their 

 bases; anterior thoracic tuft prominent but not broadened out 

 laterally so much as usual. Fore wing of similar hue and of almost 

 even tone throughout, the median space the darkest, the ante- 

 and post-medial areas tinted with a faint lilac or mauve reflection 

 in most cases, but contrasts are minute; the post medial line is 

 rather straight in its oblique course after turning past the cell 

 and but faintly indicated usually, sometimes, especially near the 

 hind margin, it becomes conspicuous in a fasciate sprinkling of 

 Avhite scales; subterminal line rarely shown as a simple marking of 

 lunulate whitish scales, excurved centrally; the central portion of 

 the reniform is sometimes indicated as a blackish shade, or it may 

 be illuminated by lighter scales of the ground colour, but generally 

 the stigmata may be said to be practically obsolete; at the outer 

 margin a minute white dot may mark the extremity of the veins, 

 and on the costa, outwardly from the inception of the post medial 

 line, four prominent white dots usually occur. Secondaries paler, 

 suffused in the deeper smoky tone at the outer margin; veins 

 darkly marked in similar hue. Expanse 40 to 50 mm. 



The male genitalia are of the usual generic type, but more 

 heavily chitinized and larger than common, the valves broader 

 than with the allies, the clasper or harpe (Pierce 1914) is toothed 

 but slightly on the outer side, the clavus an elevated ridge densely 

 clothed with short pile-like hair. 



Habitat. — The suburban environs of the city of Chicago, 111., 

 and undoubtedly following the foodplant generally through the 

 Central States. The male specimen marked type with the author 

 bears the label Cicero, 111. Twenty-five examples are under 

 examination. Paratypes are with Messrs. Kwiat and Beer, and 

 one will be placed in the United States National Museum. Emer- 

 gence dates for the ssries bred are Sept. 17 to Oct. 4. 



Silphii has broad primaries, is larger than its associates, 

 necopina, duplicata, nebris and rnaritima, being nearest the, latter 



