12 PROCEEDINGS OF THE NATIONAX. MUSEUM. vo&,. 65. 



of prothoracic leg usually " with four consecutive seta-bearing tubercles 

 beneath callous wart on apex (figs. 16, 17). Eastern United States, 



Indiana, and Missouri) Merinus LeConte. 



Epipharynx with very few spinelike setae on soft-skinned part, two of 

 which are distinctly larger and more prominent than rest {eph, fig. 15) ; 

 back of mandible with four setae, two anteriorly at base of teeth and two 

 posteriorly near fossa for dorsal articulation of mandible ; trochanter of 

 prothoracic leg usually with one small and two large set-bearing tubercles 

 beneath callous wart at apex (fig. 18) (northern species). TTpis Fnbricius. 



12. Pygidium with apically bicornute cerci (figs. 49, 50, 55) 13. 



Pygidium without cerci (fig. 52) Neatus LeConte. 



13. Pygidium without wartlike projections anterior to cerci but with two .short, 



spinelike setae on each side near cerci (flg.s. 49 and 50) ; side margins 

 sharp; anal segment with two projecting and retractile ambulatory warts 



(verrucae) (ai^% fig. 49) Teaebrio Linnaeus. 



Pygidium with a transverse series of wartlike chitinous projections anterior 

 to cerci, each one apically with spinelike projections (fig. 55) ; side mar- 

 gins not sharp; anal segment without projecting and retractile ambulatory 

 warts (verrucae) (figs. 10, 40, 44) Coelocnemis Solier. 



LARVA AND PUPA OF MERINUS LAEVIS (OLIVIER). 



While collecting in a wood lot near Falls Cliurch, Virginia, July 

 23, 1918, the author found several prepupal larvae, pupae, and adults 

 under the bark of a large, decaying limb of a maple tree which had 

 fallen to the ground. The material was determined by Dr. E. A. 

 Schwarz as Meritius laevis (Olivier). Previous records show that the 

 larvae have also been taken from under the bark of chestnut, red oak, 

 and cherry trees. According to Leng this species is found principally 

 in the eastern part of the United States, but specimens in the national 

 collection and in the collection of the Bureau of Entomology, Di- 

 vision of Forest Insects, show that it occurs as far west as Indiana 

 and Missouri. In the North, Merinus is replaced by the closely 

 allied genus Upis. 



GENERAL MORPHOLOGICAL DESCRIPTION OF THE LARVAE." 



Length 40 mm., color testaceous with head somewhat darker, sub- 

 mentum, presternum, prehypopleurum and anterior-lateral margin 

 of the prothoracic tergum, castaneous-testaceous; anterior and pos- 

 terior margins of prothorax and posterior margins of the following 

 segments finely striated longitudinally. Surface coriaceous. Form 

 elongate, cylindrical, about ten times longer than wide ; dorsally con- 



"The spines of the legs, while constant to a certain degree, sometimes vary in number 

 and development in different specimens, and occasionally on opposite legs of the same 

 specimens. 



" Conforming with Doctor Bttving's description of the larva of Emhaphion muricat um 

 (Journ. of Agri. Research, vol. 22, 1921, no. 6, ser. K., 103, pp. 323-334) to facilitate a 

 comparison between the morphological structures of these two species, which represent 

 the two distinct, but in many "respects closely related subfamilies, Tenebrioninae and tlie 

 Blaptinae. 



