STKTVTrUKS OF SOOLYTIIUQ. 



579 



Mespsternum- 

 Episternum 

 Exocoxal area 

 Epimerum-- 

 Melasternum 



Prescutal lobe 



'-- -Clavicle process 



Middle, 1 

 ..L. 



Coracoid process 



phvral suture 



TrocJianter -/- 



Fig. 134. Side view of Dendroctonus, showing names of various parts. (After Hopkins.) 



works, as Barbey, 11)01; Hagedorn, 1910; Eeitter, 1913; Xnsslin, 

 1905, 1911; Lindeman, 18751879; Blandford, 18951905, aud 

 Kleine, 1908, 1910, must also be consulted. The numerous short ar- 

 ticles by E. A. Schwarz in the early volumes of Proc. Ent. Soc. 

 Wash, and Ent. Amer. are also invaluable. The effort in the pres- 

 ent writing has been to collate and arrange in accordance with Dr. 



