Anatomy of the Male Genital Tube in Coleoptera. 559 
8. EUMOLPINAE. Humolpus swrinamensis F.,8. America. 
Chrysochus pretiosus Fabr., Bohemia. Glyptoscelis cuprascens 
Lec., California. 
9. CHRYSOMELINAE. Ovina elongata Suffr., and 0. 
speciosa L., Piedmont. Chrysomela sharpi Fowl., Scotland. 
Gastrophysa raphant Herbst., Scotland. Paropsis variolosa 
Marsh.?, Sydney. Phytodecta 5-punctata L., Piedmont. 
Phyllodecta vitellinae L., and P. vulgatissima L., England 
and Scotland. 
10. GALERUCINAE. Diabrotica soror Lec., California. 
Galerucella spp., England. 
11. Hatticinare. Haltica coryli All., England. 
12. HIsPINAE. Spilispa imperialis Baly ?, Australia. 
Cephaloleia sp. att. nigropictae Baly ?, S. America. 
13. CASSIDINAE. Mesomphalia pascoei Baly, Ecuador. 
Aspidomorpha 4-maculata O1l., Nyasaland. 
Figs. 198 to 216 Pls. LXXII, LXXIII, and LXXIV, 
relate to these forms. 
Orsodacne migriceps (Pl. LXXIT fig. 198). 
Distal half of the median lobe forming a flattened tube, with the 
ventral edge of median orifice slightly cleft at tip, and projecting 
beyond the dorsal edge, the basal half formed of two long struts on 
dorsal aspect. Tegmen forming a ring-piece with cap divided at tip. 
Internal sac long, projecting much beyond the median foramen. A 
slightly chitinised cone at the apex carries the opening of the 
ejaculatory duct. 
The two struts of the median lobe and the long sac 
place this nearer to the Longicorn type than to other 
Chrysomelidae. 
Donacia sericea (P]. LXXII figs. 199, 199a, 199d). 
Median lobe large, chitinous, tubular and curved, with the median 
orifice at apex and the median foramen large, occupying the ventral 
face of the basal half (mf). Tegmen forming a ring-piece; on the 
dorsal side the cap forms a slender lobe with hairs at the tip on 
the ventral face. The strut forms a large keel. Internal sac large 
with complex armature at its apex. This armature consists of a 
pair of lateral curved plates (c) and a median process (b) through 
which the ejaculatory duct passes and opens on its tip, a chitinous 
block (d) supports the structure at its junction with the membrane. 
D. comar. 
Is very like D. sericea but the cap is divided at the tip. Thearma- 
PP 2 
