Subject:  Big?
Geographic location of the bug:  New Jersey, USA
Date: 08/17/2019
Time: 03:15 PM EDT
Your letter to the bugman:  Hello daughter rescued this guy from our pool. He scurried away, was very fast. Looked to have front legs but back end more worm like
How you want your letter signed:  Cher Mom

Ground Beetle Larva

Dear Cher Mom,
Immature insects often present greater identification challenges than adult insects present.  We suspected this to be a Ground Beetle larva and we found supporting visual validation on Project Noah which has a similar looking image identified as a Pterostichini sp. and on BugGuide where a similar image is identified as a
Pasimachus species.   Ground Beetles are predators as larvae and adults and Caterpillars are often a preferred prey.

What's That Bug? does not endorse extermination

Subject:  Strange Flyer Dances into my Curiosity
Geographic location of the bug:  Gloucester, Va
Date: 08/14/2019
Time: 07:03 AM EDT
Your letter to the bugman:  This odd creature flew into my phone, bounced off & landed in front of me. It then proceeds to waggle it’s purplish wings & tasseled abdomen at me before retracting it’s wings (somewhere!) Only to produce them once again & promptly take off. It’s a hot and steamy August here in Virginia. I’ve been a keen observer of nature all of my life & can honestly say, this one has stumped me completely. Hope you guys can help me out!
How you want your letter signed:  Thanks a bunch! Holly G

Rove Beetle

Dear Holly,
You have good reason for being stumped.  This is a Rove Beetle in the family Staphylinidae, and many members of the family look very different from the “typical” beetle.  Unfortunately, BugGuide is currently experiencing technical difficulty and we cannot search for the species, but luckily, we were able to identify it as 
Platydracus maculosus in Beetles of Eastern North America by Arthur V. Evans where it states it is:  “the largest rove beetle in North America.”  The image with its abdomen curled up is a typical threat posture for many Rove Beetles.

Rove Beetle

Subject:  New to my yard
Geographic location of the bug:  Southwestern PA, foothills of the Appalachians
Date: 08/14/2019
Time: 09:25 AM EDT
Your letter to the bugman:  I’ve just noticed these in my yard this year – and there’s quite a few of them.   Yesterday I saw one holding another smaller bug (gnat maybe?)in its, so I’m thinking they might be carnivorous.
How you want your letter signed:  Frankie

Gnat Ogre

Dear Frankie,
Your submission has us terribly amused.  We immediately suspected this to be a predatory Robber Fly in the family Asilidae, and we tried a web search for Robber Flies with huge eyes, and we quickly found some images posted to BugGuide indicating it might be in the genus
Holcocephala, but alas BugGuide is currently having technical difficulties and is not available, so we searched that genus name elsewhere and we encountered Discover Life where we learned members of this genus are commonly called Gnat Ogres, hence the source of our amusement.  For the sake of continuity, we are going to assume the prey you witnessed was in fact a Gnat.  The name Gnat Ogre is also used on iNaturalist.  According to iNaturalist, there are 40 species in the genus.

Gnat Ogre

Thank you! I love the name!!!

What's That Bug? does not endorse extermination

Subject:  What’s this bug?
Geographic location of the bug:  Alabama
Date: 08/15/2019
Time: 10:30 PM EDT
Your letter to the bugman:  What is this?
How you want your letter signed:  Gillian McCown

Stump Stabber

Dear Gillian,
This is a female Giant Ichneumon in the genus
Megarhyssa, probably Megarhyssa macrurus.  Giant Ichneumons are sometimes called Stump Stabbers because the female uses her long ovipositor to deposit eggs beneath the bark of trees infested with wood boring larvae of Horntails.  They are not aggressive and they do not sting.

Subject:  Looks like string but moves
Geographic location of the bug:  Tampa
Date: 08/15/2019
Time: 11:20 AM EDT
Your letter to the bugman:  I am attaching a picture but I also have videos I have no idea what this is I thought I was losing my mind when I saw it move
How you want your letter signed:  Debbie

String That Moves

Dear Debbie,
We prefer not to weigh in on the state of your mind, but this looks to us to be a string that moved.  The object on the end of the toothpick appears to be of fibrous nature, possible plant or animal fibers, though we would not rule out it might be synthetic.  Light weight fibers will stir with the slightest breeze.

Subject:  Are these venomous?
Geographic location of the bug:  Sao Paulo, Brazil
Date: 08/16/2019
Time: 10:09 PM EDT
Your letter to the bugman :  Are these stinging caterpillars or slugs?
How you want your letter signed:  Danirl

Owl Butterfly Caterpillars

Dear Danirl,
These caterpillars are not venomous and they do not sting.  They are some species of Owl Butterfly Caterpillars from the genus
Caligo based on this CanStock Photo image and this Alamy image.  You can find some good information on Insetologia.