Critters in west Texas

[Dave Dudley]

On a recent trip to the Hill Country west of Austin, I encountered an
insect that is known locally as a "blister bug".  Bites by this beast
result in pronounced and painful blisters (hence the name, no doubt). 
Does anyone have any additional information on this creature?

On a similar note, there is also a plant known as a "pea vine" in the area
that is rather toxic to cattle.  I'd also be interested in any information
about this. 

As usual, thanks in advance......
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Dave Dudley  (dudleyd at aa.wl.com)  |         
Signal Transduction/Parke-Davis   |    Science is a jealous mistress.
Ann Arbor, Michigan, USA          |