Insects: Mote Drawings

Re-filed into Insects from Fungi

Mote Drawings

1. Cilia strands for airborne transfer
Egg sac inline to ovipositor/drill/proboscis
Alternating diagonal muscle strands for puncture and incubation

2. Mote Drawing

3a. Single Mote breaks from swarm
Implants into host
Proboscis drills into dermis
Passing eggs through duel  proboscis/ovipositor to inseminate host

3b. Single Mote breaks from swarm
Implants into host
Proboscis drills into dermis
Passing eggs through duel  proboscis/ovipositor to inseminate host

4. Leg Detail

5. Ovipositor Detail
Vascular Structure
Dermal Layer
Muscle Strands

6. Egg Sac Detail

David’s Drawings

The closest contemporary species similar to this mote (which lays eggs in its host) is the Tachinidae.

Life cycle

Few Tachinids are parasitic, the larvae feed on the host tissues after either having been injected into the host by the parent or penetrating the host from outside.

Oviposition and Ovoviviparity
Female Tachinids lay white, ovoid eggs with flat undersides onto the skin of the host insect.

The eggs hatch quickly, having partly developed inside the mother’s uterus, which is long and coiled for retaining developing eggs. However, it is suggested that the primitive state probably is to stick un-embryonated eggs to the surface of the host. Many other species inject eggs into the host’s body, using the extensible, penetrating part of their ovipositor, sometimes called the oviscapt, which literally means something like “egg digger”.

Usually only one egg is laid on or in any individual host, and accordingly, such an egg tends to be large, as is typical for eggs laid in small numbers. They are large enough to be clearly visible if stuck onto the outside of the host, and they generally are so firmly stuck that eggs cannot be removed from the skin of the host without killing them. Yet another strategy of oviposition among some Tachinidae is to lay large numbers of small, darkly coloured eggs on the food plants of the host species. 


  2. Wood, D. M. 1987. Chapter 110. Tachinidae. Pp. 1193-1269 in McAlpine, J.F., Peterson, B.V., Shewell, G.E., Teskey, H.J., Vockeroth, J.R. and D.M. Wood (eds.), Manual of Nearctic Diptera. Volume 2. Agriculture Canada Monograph 28: i-vi, 675-1332.
  3. Imms’ General Textbook of Entomology: Volume 1: Structure, Physiology and Development Volume 2: Classification and Biology. Berlin: Springer. 1977. 
  4. Grenier, S. (1988-04-01). “Applied biological control with Tachinid flies (Diptera, Tachinidae): A review”. Anzeiger für Schädlingskunde, Pflanzenschutz, Umweltschutz61 (3): 49–56.