Incomplete Metamorphosis Sucking insects Order Hemiptera Cockroach Order

Incomplete Metamorphosis Sucking insects (Order Hemiptera) Cockroach (Order Blattodea) Termites (Order Isoptera) Lice (Order Phthiraptera) Grasshoppers and Crikets (Order Orthoptera) Silverfish (Order Thysanura) Farwings (Order Dermaptera) Psocids (Order Psocoptera) Thrips (Order Thysanoptera) - Usually small and fast moving - Wings with feathery marginal fringe

Order Thysanoptera (Incomplete Metamorphosis) Thrips - Usually small and fast moving - Wings with feathery marginal fringe

Thrips

Thrips

Bean blossom thrips

Thrips damage

Corky scab thrips damage

Onion thrips

COLLECTION AND TEMPORARY STORAGE ☻ Specimens should be collected directly into a mixture of 60% ethyl alcohol (10 pts), glycerine (1 pt) and glacial acetic acid ( 1 pt). ☻ In this fluid they remain relaxed and often an adventage when tergal and sternal characters need examining. ☻ Thrips can be kept in this fluid for several months but 60% alcohol is preferable for longer periods of storage ☻ A drop of glycerine added to the alcohol will prevent damage to the insects should the alcohol evaporate

MOUNTING ☻ Specimens should be removed from the collecting or storage fluid and placed in 60 % alcohol for at least 24 hours, then dehydrated through a series of alcohol as rapidly as effective, but with no great changes in concentration; ☻ The time spent in each concentration depends largely on the size of specimens and the thickness of their cuticle. Recommended: 1 h in 70% alcohol, 20 min in 80%, 10 min in 95% and 5 min in absolute, followed by another 5 min in absolute. ☻ Cleared in clove oil for ½ to 10 min, 0 r, carboxylol (1 pt and 3 pts xylol) for ½ to 1 min. ☻ Mounted singly, ventral side uppermost, on a cover slip in a drop of balsam

LABELLING ☻ Two label on a good-quality paper and written in permanent Indian ink, should be stuck on each slide ☻ The label should include information on: the locality, the date of collection, the name of collector, description of habitat and plant, reference number to further notes and the name of the mountant. ☻ On the other label should written: The scientific name, including the authority; the name of the person responsible for determination; and further taxonomic and structural details where necessary

DRYING AND STORING ☻ Dry slides in a horizontal position for about a week in a slide oven; ☻ Store slides in a horizontal position in the dark, preferably in wooden slide boxes; ☻ For a quick laboratory check on field infestation, specimens can be displayed adequately by putting them on to a slide in a drop of Hoyers of Barlese fluid, covering them with a cover slip and warming briefly until the are partially cleared