COLEOPTERA. 43 



creating in length, six and seven equal in length, the latter much more 

 robust, eighth slightly shorter than the seventh, strongly clubbed, joints of 

 club elongated, nearly of equal width, ninth and tenth equal in length, last 

 slightly longer ; maxillary palpi long, piceous-brown, basal joint ilavate. 

 Prothorax robust, arcuately widening to a point slightly in advance of the 

 middle, where it is about as wide as long; sides moderately convergent 

 posteriorly and nearly straight ; anterior and posterior margins equal in 

 length, the former slightly the more arcuate ; surface feebly swollen near 

 the basal angles, closely, finely, somewhat confusedly punctate ; canalicula- 

 tion nearly obsolete, more distinct just behind the middle, feebly impressed. 

 Elytra at base as wide as the head ; sides rather strongly divergent poste- 

 riorly, longer than the width at base, feebly arcuate, much more strongly so 

 toward the apices ; together broadly, somewhat angularly and distinctly 

 emarginate behind ; suture nearly one-sixth longer than the pronotum ; 

 surface strongly impressed on the suture toward the base ; rather coarsely, 

 very closely, and somewhat evenly punctate, interspaces acutely convex and 

 very narrow. Abdominal segments decreasing extremely slowly in width, 

 first two of equal width, and as wide as the contiguous elytra; surface 

 coarsely, sub-variolately, very closely and evenly punctulate ; transverse 

 carinae tricuspid, middle cusps long and very finely acuminate, lateral 

 rather rudimentary. Legs moderate in length, rufo-fuscous, tips of femora 

 darker; first joint of posterior tarsi four-fifths longer than the second, and 

 longer than the last, second distinctly longer than the third, third and fourth 

 s lib-equal. 



Male. — Posterior edge of fifth ventral segment just perceptibly and roundly 

 emarginate in its middle fourth, contiguous surface very feebly flattened 

 throughout; sixth segment truncate at apex, truncation very feebly, just 

 visibly and very broadly sinuate. 



Female. — Sixth segment very broadly and evenly rounded behind. 



Length 3.0-3.2 mm. 



Grimsby, Ontario, 1 ; Middle States (locality not given), 1. 



This species, although resembling difficilis somewhat in form, is 

 totally distinct in the character of the sexual modifications. It is 

 dedicated with pleasure to Mr. J. Pettit, of Grimsby, Ontario. 



The parasite is small, very convex, highly polished, twice as long 

 as wide, regularly oval, and slightly longer than the first joint of the 

 posterior tarsi ; it is cinereous in color ; the long bristles are few in 

 number, and aggregated at the end nearest a very distinct transverse 

 suture. 



25. S. SCFUpeilS n. sp. — Form moderately slender. Pubescence short, 

 sub recumbent, rather sparse, bright fulvous on the abdomen, plumbeous on 

 the remainder of the dorsal surface. Head large and robust, twice as wide 

 as long; interocular surface slightly depressed, twice as wide as the eye; 

 longitudinal elevation much narrower than the lateral portions, strongly 

 and somewhat acutely convex, prominent, sulcations acute and prominent; 

 punctures small, rounded, very closely crowded toward the eyes, where they 



