How are the mouthparts of adult lacewings positioned differently from those of snakeflies?

The mouthparts of adult lacewings and snakeflies are positioned differently due to the orientation of their heads:

• Lacewings (Order Neuroptera): These insects have hypognathous mouthparts, meaning they are directed downward (ventrally).12
• Snakeflies (Order Raphidiodea): These insects have prognathous mouthparts, meaning they are directed forward (anteriorly).12

While both groups possess biting mouthparts as adults, this distinction in head orientation is a key feature used to differentiate the two orders.23