40 
Psyche 
[March 
apparently articulated to the thorax in the same manner as were the 
wings. There is no evidence as to whether or not a subimaginal stage 
was present. 
The Palaeodictyoptera, one of the most abundant and widely 
distributed orders of the oldest winged insects, apparently inhabited 
lowland of forests of the Upper Carboniferous and Lower Permian 
periods. It is clear from their haustellate mouthparts that they fed 
on liquid food only, this being almost certainly of plant origin. It is 
conceivable that the basic change in the plant life, which took place 
in the lower part of the Permian, may have been the principle 
reason for the extinction of this order of insects, along with the 
Megasecoptera and Diaphanopterodea, whereas the other contem- 
porary paleopterous orders with chewing mouthparts, Ephemeroptera 
and Odonata, were able to survive the changes. 
References 
This list includes the literature cited 
in all three parts of this series of papers. 
Agnus, A. N. 
1902. Description d’un Nevroptere fossile nouveau. Homoioptera gi- 
gantea. Bull. Soc. Ent. Fr. 1902 : 259-261. 
Bolton, H. 
1917. On Some Insects from the British Coal Measures. Quart. Journ. 
Geol. Soc. 72: 43-62. 
Borre, A. P. 
1875. Note sur des empreintes d’insectes fossiles, decouvertes dans les 
schistes houillers des environs de Mons. C. R. Soc. Ent. Belg., (2) 
12: 4-7. 
1875. Complement de la note sur des empreintes d’insectes fossiles. 
C. R. Soc. Ent. Belg., (2) 13: 7-11. 
Brauer, F. 
1886. Ansichten iiber die palaeozoischen Insekten und deren Deutung. 
Ann. Naturh. Hofmus. Wien. 1: 87-125. 
Brongniart, C. 
1883. Note sur les insectes fossiles de Commentry. C. R. Soc. Geol. Fr., 
1883: 15-16. 
1883. Apercu sur les insectes fossiles en general et observations sur 
quelques insectes des terrains houiller de Commentry. Le Natu- 
raliste, 5 : 266-268. 
1885. Les insectes fossiles des terraines primaires. Bull. Soc. Rouen. 
1885 : 50-68. 
1890. Note sur quelques insectes fossiles du terrain houiller qui pre- 
sentent au prothorax des appendices aliformes. Bull. Soc. Philo- 
mat. Paris, ser. 8, 2(3): 154-158. 
1893. Recherches pour servir a 1’histoire des insectes fossiles des temps 
primaires. 493 pp. Atlas, 44 pp. [thesis]. 
