52 PROCEEDINGS OF THE NATIONAL MUSEUM voi. m 



8. Lacinia dorsally with a row of J3ve long setae near the mesal edge and a short 



seta posteriorly; galea ventrally with a row of less than 11 short setae. . 9 

 Lacinia dorsally with a row of eight long setae near the mesal edge and a 

 short seta posteriorly; galea ventrally with a row of 11-14 short setae. 



haniatus Say 



9. Abdominal segments 6-8 dorsally each with two transverse rows of setae . . 10 

 Abdominal segments 6-8 dorsally with three transverse rows of setae; galea 



ventrally with a row of eight short setae; raster with 51-81 short tegillar 

 setae; second and third antennal segments subequal, first long. 



vittatus Say 



10. Galea ventrally with a row of eight or more short setae 11 



Galea ventrally with a row of six or seven short setae. Second and third 



antennal segments subequal, first long; maxillary stridulatory area on stipes 

 with 8-10 teeth; raster with 36-50 tegillar setae. (Collected from ant's 

 nest) Aphodius sp, 



11. Second and third antennal segments subequal, first long; width of head 



capsule 1.82-2.05 mm.; frons on each side with two depressions. 



sparsus LeConte 



First and third antennal segments subequal, second short; width of head 



capsule 0.86-0.92 mm.; frons on each side with four depressions in a line. 



neotomae Fall 



12. Lacinia dorsally with a row of five long setae along the mesal edge and a short 



seta posteriorly; spiracle-bearing area with two setae ventrally; clypeus 

 without any protuberance; lower anal lobe emarginate, partially subdivided 



into sublobes; claws slender 13 



Lacinia dorsally with a row of seven or eight long setae along the mesal edge 

 and two or three short setae posteriorly; spiracle-bearing area with 4-6 

 setae ventrally; clypeus with a transverse broad protuberance in the middle 

 of anterior margin of its sclerotized part; lower anal lobe emarginate, par- 

 tially subdivided into four sublobes; claws rather short. 



erraticus (Linnaeus) 



13. Galea ventrally with a row of seven or more short setae 14 



Galea ventrally with a row of five short setae. Abdominal segments 6-8 



dorsally each with three transverse rows of setae ; second and third antennal 

 segments subequal, first long; width of head capsule 1.41-1.70 mm.; raster 

 with 34-47 tegillar setae prodromus Brahm 



14. Raster with less than 43 tegillar setae 15 



Raster with more than 43 tegillar setae 17 



15. Raster with more than 23 tegillar setae 16 



Raster with 17-22 tegillar setae; width of head capsule 0.89-0.96 mm. 



stercorosus Melsheimer 



16. Abdominal segments 6-8 dorsally each with three transverse rows of setae; 



width of head capsule 1.25-1.35 mm.; frons on each side with two depressions. 



lividus (Oliver) 

 Abdominal segments 6-8 dorsally each with two transverse rows of setae; 

 width of head capsule 0.86-0.89 mm.; frons on each side with three depres- 

 sions in a line troglodytes Hubbard 



17. Abdominal segments 6-8 dorsally each with three transverse rows of setae; 



first and second antennal segments subequal, third short; width of head 



capsule 1.22-1.45 mm haemorrhoidalis (Linnaeus) 



Abdominal segments 6-8 dorsally each with two transverse rows of setae; 

 first, second and third antennal segments subequal; width of head capsule 

 1.32-1.35 mm pectoralis LeConte 



