1972] 
Kukalovd-Peck — Palaeozoic Insect Order $ 
267 
they have alternating ridges and grooves, enabling firmer connection. 
The mandibular stylets are hollow and the cavity is crossed by rows 
of perpendicularly oriented pillars, providing additional mechanical 
support. 
The legs have short, conically truncate coxae. Proximally, on the 
ventral side, there are two circular structures, which perhaps rep- 
resent the katapleuran ring separated by a sigmoidal paracostal su- 
ture from the anapleuran ring. The trochanter is triangular, grown 
together with the femur as in Odonata. 
The ovipositor is provided by styli as in extant Odonata. 
Literature Cited 
Brongniart, C. 
1885. Les insectes fossiles des terrains primaires. Bull. Soc. Rouen: 
50-68. 
1885. Die fossilen Insekten der primaren Schichten. Jahrb. k.k. Geol. 
Reichsanstalt, 3 5 (4): 649-662. 
1890. Note sur quelques insectes fossiles du terrain houiller qui pre- 
sented au prothorax des appendices aliformes. Bull. Soc. Philo- 
matique de Paris, 8 ser. 2(3) : 154. 
1893. Recherches pour servir a Phistoire de insectes fossiles des temps 
primaires. 493 pp. Atlas, 44 pp. 
Brauer, F. 
1886. Ansichten iiber die palaozoischen Insekten und deren Deutung. 
Ann. k.k. Nat. Hofmus., Wien, 1: 87-125. 
Carpenter, F. M. 
1930. The Lower Permian Insects of Kansas. Part 3. The Protohy- 
menoptera. Psyche, 37(4): 343-374. 
1933. The Lower Permian Insects of Kansas. Part 6. Delopteridae, 
Protelytroptera, Plectoptera and a New Collection of Proto- 
donata, Odonata, Megasecoptera, Homoptera and Psocoptera. 
Proc. Amer. Acad, of Arts & Sci., 68(11) : 411-503. 
1947. Lower Permian Insects from Oklahoma. Part 1. Introduction 
and the Orders Megasecoptera, Protodonata, and Odonata. Proc. 
Amer. Acad, of Arts & Sci., 76 ( 2) : 25-54. 
1951. Studies on Carboniferous Insects from Commentry, France. 
Part II. The Megasecoptera. Jour, of Paleont., 25 (3): 336-355. 
1962. A Permian Megasecopteron from Texas. Psyche, 69(1): 37-41. 
1971. Adaptation among Paleozoic Insects. Proc. North Amer. Paleont. 
Convention, Sept. 1969. Part 1: 1236-1251. 
Carpenter, F. M. and E. S. Richardson, Jr. 
1969. Megasecopterous Nymph in Pennsylvanian Concretions from 
Illinois. Psyche, 75 (4): 295-309. 
1971. Additional Insects in Pennsylvanian Concretions from Illinois 
Psyche, 78(4) : 267-295. 
Crampton, G. C. 
1927. Eugereon and the ancestry of the Hemiptera, psocids, and 
Hymenoptera. Bull. Brook. Ent. Soc. 22: 1-17. 
