44 EDWARD P. VAN DUZKK. 



5. Form not distinctly dejiressefl, tlie sides of the ])ronotuni sometimes a little 



expanded and leflexed before tlie humeri, in that case the middle of 



the venter marked with a row, sometimes incomplete, of Idack spots. G. 



Form distinctly depressed es[)ecially within the hiteral marjiins of the pro- 



notum ; venter without hiack spots 9. 



6. Size larger (12-14 mm.); venter without distinct black spots i>n the median 



line 7. 



Size smaller (under 12 mm.); venter with a row of black spots, sometimes 

 al most obsolete 8. 



7. Humeri ))rominent, acute or rounded, never spinose; ujiper surface rather 



closely irregularly punctured ; inhabits eastern and soulheiii States. 



servus. 



Humeri acutely spinose ; upper surface paler; punctures more distinct and 



regularly disposed iiii|)i<^liv«*iif I'lN. 



8. Humeri prominent, rounded; til'th joint and apical half of the fourth joint of 



the anteiuiie black I risligiiiUN. 



Humeri produced, acute or spinose; antenna; entirely pale or rufous. 



var. pyrrhoeei'us. 



9. Size larger (over 10 mm.); punctures on the upi>er surface forming round 



black scattering dots, more noticeable on the elytra; genital segment 



of the male broadly concavely arcuated 10. 



Size small (under 10 mm.); latero-anterior margins of the jironotum almost 

 rectilinear, pale, defined within by black punctures; genital segment 

 of the male with a rather deep rounded median notch politus. 



10. Legs dotted with black ; apical poition' of the fifth antennal joint blacki^ll, 



second joint shorter than than the third COllMpei'MllM, 



Legs with not more than about four black points; ai)ical two joints of the 

 antennae dusky, second and third joints suhequal iiillalujii. 



11. Prouotum with a raised calloused somewhat irregular line between the humeri ; 



genital segment of the male without a black spot on its base. 



ictericiiN. 



Pronotum without a continuous calloused line between the humeri; genital 



segment of the male with a blackish basal spot variiklariiii^. 



12. Size larger (11-12 mm.) ; punctures finer and closer on the head and anterior 



portion of the pronotum leaving an obvious but somewhat irregular 

 pale vitta between the prominent subacute humeri, these punctures 

 segregated so as to form scattering round black dots on the elytra. 



bifibuluM. 

 Smaller (10 mm. or less). 13. 



13. Form broad ovate ; humeri prominent, acute; upper surface with scattering 



pale points; genital segment of the male rounded at apex, feebly 



sinuated at the middle. crenalor. 



Form oblong; upper surface regularly and coarsely i)U net u red ; genital seg- 

 ment of the male broad at the apex and feebly trisinuated. 



zupilotensis. 



Eii««clii!i«tu!!i flisii^iliK Uhler, 



This is one of the most abiindaut and widely distributed of our 

 North American Peutatotnids. It is found from Quebec to Van- 



