1906.] ^53 



4. Abdomen beneath more or less fulvescent 5. 



— Abdomen beneath entirely black 6. 



5. The (J is unknown. The $ witli apical ventral segments entirely fulvous... 



paedidus, Knw. 



— (? with apical ventral segments fulvous (dark orange). ? with the bases of the 



apical ventral segments black, their apices narrowly orange-fulvous... 



hiscalis, Forst. 



6. Mesopleurge somewhat dull, closely punctured (one of the larger species. 



6-8 mm. long) mollis, Htg. 



— Mesopleurse without distinct puneturation, more or less shining 7. 



7. Stigma blackish-brown. (Very distinct by its remarkably long and much com- 



pressed antennae, with joints sharply produced at their apices, and in the ^ 

 emarginate beneath) compressicornis, F. 



— Stigma pale (yellow or white) 8. 



8. Legs, tegulae, stigma (at least at its apex, the base being dusky) and last ? 



dorsal segment white ; hind femora splashed with black above before their 

 apices, apices of tibiae narrowly and tarsi blackish. Central impression on 

 eighth (J dorsal segment with a rounded base (so that it is more or less 

 semi-circular, not triangular !). Saw-sheath of ? (seen from above) pro- 

 jecting, dilated and emarginate at apex leucopodius, Htg. 



— Legs, tegulae and (unicolorous) stigma distinctly flavescent. Last ? dorsal seg- 



ment only partly and obscurely pale. Central impression on eighth ^ dorsal 

 segment triangular. The saw-sheath of ? is scarcely visible from above, 

 being short and concealed under the apical segment, but it seems to me 

 neither dilated nor emarginate laricis, Htg. 



fTo be continued). 



SOME REMARKS ON OTTO FREDERIK MULLER'S DESCRIPTIONS 



OF THE DANISH ODONATA, 



WITH CERTAIN CORRECTIONS AS TO SYNONYMY. 



BY ESBBN PETERSEN. 



In the year 1764 0. F. Miiller published his work " Fauna 

 Insectorum Fridrichsdalina," in which he named and described all 

 the insects (858 species) he had found in the neighbourhood of 

 Frederiksdal in North Sealand. This was the first list of insects 

 from any definite region published in Denmark. In 1767 (although 

 dated 1763) was published his " Enumeratio ac Descriptio Libellu- 

 larum agri Fridrichsdalensis " in " Nova Acta Physico - Mediea 

 Academife Csssareae Leopoldino-Carolinse Naturae Curiosorum," in 

 which he described the Odonnta found in the Frederiksdal district. 

 In the year 1776 he published his " Zoologiae Danicse Prodromus," in 



