Three-spot grass yellow?

[Commander]

I suppose the wet, wet weather is encouraging Horace to shoot whatever comes his way. Even if they're these common yellow butts.

And yes, E. ada has only two cell spots. E. blanda is the only species with 3 cell spots. This is described clearly in my Eurema spp. ID key posted earlier.

It's a female Three Spot Grass Yellow that you've shot. Unfortunately, C&P4 does not feature the female of the species, leading to the belief that the females have the very thin black wing margin as the male pictured in C&P4. The females have thicker borders, with the deeply excavated border in space 3 & 4 like the other Yellows.

The apical patch appears variably in this species, and a few of the others, so as an ID characteristic, it is not reliable to use this apical patch. Interestingly, both the Indian and Hong Kong books feature some of the Common Grass Yellows in different forms where the apical patch is featured on one of the "forms". Perhaps this phenomenon also applies to the Malaysian/Singaporean species, but not well researched.

Here are some shots of the Three Spots during a period when they were plentiful at TBHP. In the mating pair, the female shows the thicker black wing borders, as well as some markings on the apical area of the forewings.