frequency 
70 
Psyche 
[March 
Fig. 6. Daily frequencies of the two most abundant species in the Legon trap 
samples, with days of missing samples indicated. 
rule. However, in the Old World Dorylini examined—mainly in 
Anomma —Raignier and van Boven (1955) denied such cyclic 
behaviour to be present. My data (Figs. 3, 4) suggest 1) males are 
produced, at least by the five most common species, throughout the 
year, 2) there is a regular annual cycle in the timing of male flights, 
3) this cycle is synchronous in the four most abundant species (and 
perhaps in all), 4) males are emitted about every 30 to 32 days 
between about March through September—around every 28 or 29 
days in December through February. 
Just as Rettenmeyer (1963) was able to confirm the presence of 
Schneirla cycles in a wide range of Neotropical and Nearctic Ecito- 
nini species the present figures indicate that such cycles hold true in 
the Ethiopian Dorylini—and presumably too the Oriental, for they 
are for the most part congeners. But Raignier and van Boven were 
correct in noting the production of males throughout the year, con¬ 
firmed by Haddow et a). (1966) through light-trap sampling. The 
phenomenon is still undetected in Ecitonini. Neither the observa¬ 
tions of Rettenmeyer (1963) nor of Kannowski (1969) were con¬ 
ducted during a complete calendar year but the temporal spread of 
the latter’s positive scoring of, for example, alate males of Lahidus 
