Hey BV, You are correct in your observations, that male is true 'infuscatus' and the female true 'cowlesi' but...
...to clear up things for everybody…
...taxonomically things have changed drastically, as the Aspidelaps genus was turned upside down, shaken and fully revised recently by Donald Broadley and Andrew Baldwin
*. They took the original A.l.infuscatus and A.l.cowlesi and united them together into one far ranging variable subspecies (A.l.cowlesi). The only other subspecies in the Genus is A.l.lubricus. Subsequently there is no more A.l.infuscatus!!! You can now find A.l.cowlesi in Keetmanshoop, southern Namibia!!
They even suggested new english names!! Now the accepted english name for the 2 spp are Coral Shield Cobra and Namibian Shield Cobra. The distinction is what they call 'light phase' and 'dark phase'. All previous A.l.infuscatus from most of Namibia is now called 'dark phase' A.l.cowlesi. The specimens with the orange or light heads from far northern Namibia are now called 'Light phase' A.l.cowlesi. Originally the main difference between cowlesi and infuscatus besides colour and distribution was based on the temporal formula on the side of the head. This often turned out to be unreliable.
Anyway I myself prefer to call them 'infuscatus' phase and 'cowlesi' phase respectively
The female being mated in the in the pictures above is from the Brandburg Mountains, Namibia and was technically a true 'cowlesi' or 'light' phase A.l.cowlesi according to her locality but the temporal formula on her head is that of a 'infuscatus'???
Here is a picture of a huge animal that I considered true 'cowlesi' based on the fact that it was found at Ruacana on the Namibia/Angolan border.
Personally, I find 'cowlesi' animals to have a broader/thicker, more cobra like head.... whereas 'infuscatus' always have a narrower, more bullet shaped head. Based on this alone I would have left the subspecies separated and valid. But what do I know.
* Broadley, D.G. and A.S. Baldwin, 2006. Taxonomy, Natural History, and Zoogeography of the Southern African Shield Cobras, Genus Aspidelaps
(Serpentes, Elapidae). Herpetological Natural History, 9 (2): 163 –176.
.