232 PROCEEDINGS OF THE NATIONAL MUSEUM vol. io4 



separated from the carina, not forming a smooth area between the carina 

 and the punctures; color dorsally usually green, bronze, or purple; middle 

 tarsus of male not similar to that of female, thickened (southeastern Canada 



to Florida). Subspecies of splendidus (Fabricius) 9 



9. Color bright green, size moderate (generally east of Appalachian Mountains). 



splendidus splendidus (Fabricius) 

 Color coppery green to purplish black, size large (generally west of the 



Appalachian Mountains) splendidus miarophagus Say 



10. Base of left dorsal paramere of male genitalia not extending posteriorly beyond 

 base of right dorsal paramere (pi. 4, figs. 4, 5) ; unevenly spaced teeth on 

 underside of foretibia of male largest apically, becoming evenly smaller 

 basally (pi. 2, fig, 10); punctures in elytral striae usually moderately pro- 

 nounced (Massachusetts and eastern Ohio south to Florida east of the 



Appalachian Mountains) blackburnii blackburnii Fabricius 



Base of left dorsal paramere of male genitalia extending posteriorly beyond 

 base of right dorsal paramere (pi. 4, fig. 6) ; unevenly spaced teeth on under- 

 side of foretibia of male largest in the center, becoming smaller both 

 apically and basally (pi. 2, fig. 11); punctures in elytral striae usually only 

 vaguely defined (Iowa, Indiana south to Texas, generally west of the 

 Appalachian Mountains) blackburnii excrementi Say 



Key to the known larvae of the North American species of Geotrupes 



1. Sclerotized lines of the endoskeletal figure of the ventral anal lobe almost 



meeting, forming a triangular area, and below this continuing on to fuse with 

 the sclerotized line defining the ventral edge of the anal lobe (pi. 7, figs. 15, 



17) 2 



Sclerotized lines of the endoskeletal figure of the ventral anal lobe meeting 

 and forming a triangular area, without the narrow continuation to the ventral 

 edge of the anal lobe stercorarius (Linn6) 



2. Tip of tibiotarsus of each leg with tubercle bearing a minute brownish claw . 3 

 Tip of tibiotarsus of each leg usually with a small tubercle (pi. 7, figs. 10, 16), 



but in all cases the minute brownish claw is lacking 5 



3. Epipharynx bearing, anterior to the pedium, an irregular transverse row of 10 



to 12 very stubby setae (pi. 8, fig. 1) ; posterior epitorma of epipharynx 

 slightly longer than anterior epitorma (pi. 8, fig. 1). 



splendidus splendidus (Fabricius) 



Epipharynx bearing, anterior to the pedium, an irregular transverse row of 5 



to 7 setae, not dififering greatly in length from the setae on the chaetoparia; 



anterior epitorma of epipharynx slightly longer than posterior epitorma . . 4 



4. Setae in front of the hypopharyngeal oncyli and behind the anterior transverse 



row of sensilla with their origins much nearer in position to the midline than 

 are the outermost sensilla (pi. 8, fig. 2). 



blackburnii blackburnii (Fabricius) 



Setae in front of the hypopharyngeal oncyli and behind the anterior transverse 



row of sensilla with their origins about the same distance from the midline 



as the outer sensilla (pi. 8, fig. 5) blackburnii excrementi Say 



5. Maxilla with inner surface of galea (pi. 7, fig. 1) bearing only 6 or 7 setae; 



epipharynx with row of fine setae extending from tip of posterior dexio- 



pternotorma to tip of posterior epitorma ulkei Blanchard 



Maxilla with inner surface of galea bearing 9 or more setae; epipharynx lacking 

 a continuous row of setae from the tip of the posterior dexiopternotorma to 

 tip of posterior epitorma 6 



