50 PROCEEDINGS OF THE NATIONAL AIUSEUM vol. iii 



Oxyomus silvestris (Scopoli) 



Figures 10, 13, 26, 40, 60, 71, 79 



Material examined: Five third-stage larvae and two second-stage 

 larvae collected in soil around roses at Luxemburg, May 24, 1949 

 (USNM). 



Description: Maximum width of head capsule of third-stage larva 

 0.83-0.92 mm. Cranium light yellowish brown, smooth, two or three 

 dorsoepicranial setae and two microsensillae on each side. Second 

 and third antennal segments subequal, first longer than second or 

 third. 



Epipharynx with protophoba bistichous on left and monostichous 

 on right; protophoba with. 16-18 microsensillae. Laeophoba poly- 

 stichous; dexiophoba monostichous; mesophoba monostichous in the 

 middle and polystichous on the sides. Crepide subtriangular. Tormae 

 asymmetrical, dexiotorma produced cephalad and caudad, laeotorma 

 small and slightly produced caudad with end blunt. 



Scissorial area of left mandible with S1+2, S3 and S4, and of right 

 mandible with S1+2 and S3+4. Each mandible dorsally with two setae 

 and ventrally with a single seta. 



Maxillary stridulatory area with a row of seven conical teeth; 

 palpifer with three teeth. Galea dorsally with fom- stout setae, 

 ventrally with a long seta and a row of seven or eight short setae. 

 Lacinia with terminal uncus of three ventral toothlike lobes, dorsally 

 with a row of five long setae along the mesal edge and a short seta 

 posteriorly. 



Abdominal segments 1-6 each with three dorsal annulets; each 

 annulet with a transverse row of setae except the last annulet of 

 segment 6. On the annulets of segments 1-5 each prescutum with 

 six short setae, each scutum with three long setae and three short 

 setae on each side, and each scutellum with eight short setae. Seg- 

 ments 7-10 each with two transverse rows of setae but dorsa not 

 subdivided into annulets. Segments 9 and 10 strongly tapering in a 

 concave curve. Each abdominal spiracle-bearing area with two setae 

 ventrally and a single seta dorsally. 



Raster with two longitudinal palidia surrounded on sides by 9-14 

 tegillar setae. Each palidia with 7-9 caudomesally directed spine- 

 like setae. Tegillar setae arranged in two rows, one on each side of 

 palidia. 



Genus Aphodius Illiger 



Larvae of the genus Aphodius may be characterized as follows: 

 Frons, on each side, with two short posterior frontal setae with a 

 microsensilla (in A. erraticus two or three setae with two microsen- 

 sillae) , a short anterior frontal seta and a microsensilla, a long exterior 



