spissipes?

A. crassipes is almost entirely black, though some specimens show more red. This is probably spissipes, but I'd have to compare it with specimens in a collection, and/or key it out.

(I don't understand the terminology, but it looks straightforward for someone who does)

Keys to the subfamily Apiomerinae
1. Larger 14-19 mm.; Pronotum black, margins narrowly edged in red; ventrals usually wholly black; corium blackish-brown..…………...……...Apiomerus crassipes Fabricius (fig. 4)

1a. Under 13mm…………………………………………………………………………………… 2

2. Pronotum with disk in part red; ventrals each with a distinct pale transverse median bar, their front and hind margins black; corium in great part reddish-brown; smaller. ……………………………………………………………………Apiomerus spissipes Say

2a. Not as above………………………………….Apiomerus flaviventris Herrich-Schaffer

..but I don't know if there are similar species in TX. I know a couple species look quite similar.

That's why I'm trying to get at least my house in order. Does anyone know whether or not the amount or absence of red/white colors has any significance?

A. spissipes and A. crassipes are the two I've been looking at.

It's also mentioned in Insects of the Los Angeles Basin and I'm guessing it's correct for mine.

I'm not good with keys, but someone who is should check page four here:
http://entnemdept.ifas.ufl.edu/choate/Florida_reduviidae.pdf for what may well be definitive information.

and am also searching for an ID.