1971] Carpenter & Richardson — Pennsylvanian Insects 
279 
Figure 9. Homaloneura dahasinskasi Carpenter. Photograph of cross- 
section of beak; specimen in Tidd collection. The arrow points to the 
median stylet. 
setae, as in other Palaeodictyoptera. The coxae are prominent and 
in the obverse half of the fossil extend anteriorly from the pro- 
thorax. The tarsal segmentation is not discernible, except for the 
first tarsomere. 
The head is only vaguely indicated in the fossil (reverse half) 
but just anterior to the head itself there is a transverse section of 
the sucking beak, this being visible at the point where the two 
halves of the concretion separated. In order to appreciate the sig- 
nificance of this section, it must be borne in mind that conclusive 
evidence has now been provided, in the publications of Crampton 
(1927), Lameere (1933), Laurentiaux (1952 and 1953) and Ku- 
kalova (1969 and 1970), showing that all of the Palaeodictyop- 
tera possessed a haustellate beak. According to observations pre- 
viously made (and summarized by Kukalova, 1970), the beak 
consisted of four slender stylets, apparently supported ventrally by 
a long and somewhat broader labium, usually transversely ridged. 
