PROC. ENT. SOC. WASH., VOL. 20, NO. 3, MAR., 1918 61 



1910. SNODGRASS: Thorax of Hymenoptera, in: Ibid., 39, p. 37. 



1910. SNODGRASS: Anatomy of the Honeybee, in: U. S. Dept. Agr. Bull. 



18, Technical Series. 

 1903. VERHOEFF: Morphologic des Thorax der Insekten, in: Nova Acta 



Abh. K. L. D. Akad. Naturf., 81, p. 63. 



ABBREVIATIONS. 



a, Anterior tergal plate. 

 al, Alar area. 



b, Apical tergal plate. 



bs, Basisternum or basisternite. 



c, Lateral tergal plate or plates. 

 ex, Coxa, or bands representing 



coxa. 



d, Lateral plate or subalar plate (?). 

 em, Epimeron. 



en, Eunotum. 



ep, Eupleuron. 



es, Episternum. 



e(, Eutrochantin. 



/, Furcal pits. 



/s, Furcasternum or furcasternite. 



int, Intersegmental region. 



ip, Interpleurites or subspiracular 



plates. 



is, Intersternite, or gular plate. 

 it, Intertergite. 

 Ic. Lateral cervical plates. 



Ip, Lateropleurite. 



Is, Laterosternite. 



mn, Mesonotum. 



p, Parapophyses, or parapophysis 



plate. 



per, Perinotum. 

 pfs, Postfurcasternite. 

 pn, Pronotum. 



po, Postcoxal sclerite or region. 

 pot, Postergite. 

 pp, Surcoxal plate. 

 prt, Pretergite. 

 ps, Presternum. 

 psc, Prescutal region. 

 psl, Postscutellar region. 

 s, Spinal pit or depression. 

 sc, Scutal region. 

 sp, Spiracle. 



ss, Spinasternum or spinasternite. 

 st, Sternum. 

 In, Trochantin. 



