Fig. 2. Genital anatomy of male Boreus notoperates. A, terminalia 
viewed obliquely from the right side. The epandrium (ep), or tergite-IX, 
has been separated from its articulations on the right, and reflected about 
60° to the left. The anus, enclosed by proctigeral plates (cross-lined) lies 
immediately below the epandrial notch, the spined epandrial bosses to each 
side. Gonostyles abducted on right, displaying in profile the short, sharp 
medial tooth which engages the lateral basal notch of the gonapophysis. 
The dorsal gonobase (dg) extends anteriorly from the gonocoxites, flaring 
out as the roof of the anterior end of the endandrium. Median plaque (stip- 
pled) immediately over the aedeagus forms the floor of the endandrium; 
aed — partially everted aedeagus, ejr — right ejaculatory duct, hyp — hy- 
pandrium, r — rectum. 
B, partially exserted aedeagus (aed), right lateral view. Epandrium, proc- 
tiger, right gonocoxite and hypandrium have been removed. Above, dg, 
the left dorsal half of the gonobase; below, vg, the left ventral half of the 
gonobase. Sclerotized plaque (stippled) overlying the aedeagus joined by 
a fan of muscles to U-shaped sclerite (stippled) partially encircling the 
aedeagus ventrally. The genital chamber is the space enclosed between 
the dorsal and ventral gonobases, the endandrium lies between the dorsal 
gonobase and the sclerotized plaque, and the aedeagal chamber lies between 
the sclerotized plaque and the ventral retractor muscle attached to the ventral 
gonobase; ejr — right ejaculatory duct. Both figures from camera lucida 
drawings; scale equals 0.5 mm. 
