Lab Practical 7

Question 1

2.5mm, yellow/orange, gnat-like, 14 antennal segments… larvae - 3mm, bright yellow, horizontal mandibular mouthparts… leaf mining (blotched)

Answer 1

Nematocera: Cecidomyiidae; boxwood leafminer

Question 2

yellow and pink leaf galls on maple

Answer 2

Nematocera: Cecidomyiidae; ocellate leaf gall

Question 3

leaf galls on the veins of oak leaves

Answer 3

Nematocera: Cecidomyiidae; vein pocket gall

Question 4

twig galls on the distal ends of branches

Answer 4

Nematocera: Cecidomyiidae; dogwood club gall

Question 5

3mm, red eyes, black bodies; serpentine leaf mines

Answer 5

Brachycera: Agromyzidae; Native/Holly leaf miners

Question 6

5-8mm long (females are larger); females: black and red-brown head and upper thorax, sometimes white on the sides of abdomen >19 segmented serrated antennae; Males: black body, feather antennae… cocoons are red/brown, hard, cylinder, paper-like… larvae: yellow/green body, black spots, less than 1 inch long, red/orange head… larvae defoliate

Answer 6

Symphyta: Diprionidae; redheaded pine sawfly

Question 7

etching damage on oak leaves

Answer 7

Symphyta: Tenthredinidae; Oak slug sawfly

Question 8

yellow/green body, less than 3/4 inch long, slimy appearance… etching damage

Answer 8

Symphyta: Tenthredinidae; Roseslug sawfly

Question 9

3-6mm long, black bodies… blotched leaf mining

Answer 9

Symphyta: Tenthredinidae; Birch leafminer

Question 10

brown, blue, or black bodies with yellow markings; long cylindrical abdomen; long spur coming out of the abdomen

Answer 10

Symphyta: Siricidae; wood wasp “horntail”

Question 11

1-2 inches long, brown/red hairy bodies with yellow markings, forewings fold in half, eyes indented… dieback girdling at branches and shoot/branch dieback

Answer 11

Apocrita: Vesidae; European hornet

Question 12

first segment of hind tarsi as long as following 2-3 tarsi combined; humpbacked; abdomen with 2 segments visible dorsally, remainder is telescoped beneath

Answer 12

Apocrita: Cynipidae; Gall Wasps

Question 13

forms gall around branch/stem, 1.5 inches in diameter, colors vary, horns protrude from mature galls, on oak

Answer 13

Apocrita: Cynipidae; horned oak stem galls

Question 14

round in shape, 1/2 inch diameter, colors vary, some covered in fine hairs, some are smooth, on oak

Answer 14

Apocrita: Cynipidae; oak bullet stem galls