54 BULLETIN 1107, TJ. S. DEPARTMENT OF AGRICULTURE. 



cerci on the dorsal side of the ninth abdominal segment; the other 

 larval stages of Lyctus planicollis Lee. being without armature. (PI. 

 I, Fig. 8 sketched by Dr. Snyder from a larva in balsam mount reared 

 from the egg ; showing ninth abdominal segment from the end, placed 

 in somewhat oblique position to exhibit both of the cerci and at the 

 same time give a view of their lateral outline.) 



Second and Following Larval Stages. 



PI. I, Figs. 13, 14, 15. 



In the general aspect and the shape and proportions of the mor- 

 phological details, the second larval stage is only slightly different 

 from the mature larva, which may be seen by a mere comparison of 

 PL I, Figs. 13-15 with the corresponding figures of the mature form. 

 The following stages also are almost identical with the mature larva, 

 except in size and minor details. 



SECOND LARVAL STAGE. 



Length: 0.56 millimeter; width, 0.21 millimeter; length in proportion to 

 length of first stage larva (PI. I, Fig. 9 drawn with same magnification as 

 PI. I, Fig. 13) as 3:4; width as 4:3. 



Head capsule: With few setae. 



Labrum: Not densely set with setae. 



Mandible: Brown. 



Maxillary outer lobe and ligula: Not densely covered with setae. 



Legs: First pair with five setae. Second pair with three. Third pair with 

 two setae. 



Body form, color, and setce: Slightly curved. Epipleural lobes not developed. 

 Dull white. Few setae dorsally on the posterior abdominal segments. 



Body movements: Active. 



THIRD LARVAL STAGE. 



Head capsule: With more setae than in preceding stage. 



Labrum: Distally covered with numerous light brown setae. 



Mandibles : Dark brown. 



Maxillary outer lobe and ligula: Covered with numerous setae. 



Legs: First pair with 7 setae on femur; 8 to 10 on distal end of tibia; tibial 

 spine developing near claw-shaped tarsus. Second pair with 1 seta on femur ; 

 5 on tibia ; tibial spine developing. Third pair with no setae on femur ; 4 on 

 tibia ; tibial spine developing. 



Body form, color, and setw: Curved. Epipleural lobe developing. Dull white. 

 Posterior abdominal segments more hairy than in preceding stage; epipleural 

 lobe with a few setae. 



Body movements: Active. 



THE FOURTH AND FOLLOWING LARVAL STAGES. 



These stages differ from the third stage by darkening of mandibles and 

 chitinization on ventral mouthparts ; by presence of more and coarser setae on 

 femora and tibiae; by stronger development of tibial spines; by more curved 

 form ; by a stronger coloring of chitinous rod of prothorax ; by more prominent 

 epipleural lobes with additional setae. Body movements are very active. 



Body proportions of a medium sized larva: Length, 5 millimeters; width, 1.75 

 millimeters ; distance between head and anus when curled, 3.50 millimeters. 



Prepupal larva: Length, 8 millimeters; width, 2.75 millimeters. Creamy 

 white or light yellow. Straightened and more active. 



DESCRIPTION OF THE MATURE ADULT OF SCOBICIA DECLIVIS LEC. 

 By R. D. Hartman. 



GENERAL DESCRIPTION. 



Form cylindrical, head deflexed; size small (average length, 5.85 millimeters; 

 average width, 2.10 millimeters) ; the prothorax and abdominal sternites about 



