Lasius myops - "Pale Yellow Ant"
Lasius myops is a fascinating ant species often recognized by its pale yellow body and appendages. They are closely related to the well-known Lasius flavus but can be distinguished by their slightly smaller size and noticeably smaller eyes. Unlike some other Lasius species, Lasius myops workers don't show much polymorphism, meaning there aren't distinct 'major' workers. These ants are known for nesting under stones and within cracked rock walls bonded with clay, often found in dry areas or oak and pine forests. This species is also notable for being a host to temporary parasitic ant species, indicating a unique role in their ecosystem.
- Difficulty: Medium
- Origin & Habitat: Palaearctic Region (Europe, North Africa, Asia) in Dry areas, luminous oak forests, pine forests, under stones, within cracked rock walls bonded with clay..
- Colony Type: Monogyne (single queen), but can be temporarily pleometrotic in founding stages., temporary parasitic (queen invades another species' nest) founding.
- Size & Growth:
- Queen: 10-15mm
- Worker: 0.5-1.08mm
- Colony: Medium (thousands). Medium growth.
- Antkeeping:
- Temperature: Ideally, keep the nest between 20-27°C for optimal brood development. While they can tolerate higher temperatures up to 32-33°C, prolonged exposure without proper hydration can be detrimental. Providing a temperature gradient allows the colony to choose their preferred spot..
- Humidity: A humidity level of 10-50% is generally suitable. They don't require extremely high humidity but should not be kept too dry. Ensuring a good moisture source within the nest, such as a hydrated substrate or water tower, is important for their well-being..
- Diapause: Required. 3-4 months at 5-10°C.
- Nesting: In the wild, Lasius myops nests under stones and in cracked rock walls, often bonded with clay. For captive keeping, they thrive in setups that mimic these conditions, such as naturalistic formicaria with soil or sand, or even acrylic nests with good hydration systems. Given their tendency to spend a lot of time underground, a nest that allows for easy viewing of subterranean activity is recommended..
- Behavior: Low (towards handler, food or other ants) aggressiveness.
- Common Issues: Failure to introduce queen to host workers, Insufficient host workers, Mold in nest, Mites, Colony stalling due to improper diet or temperature, Humidity fluctuations, Queen stress.
One of the most crucial aspects of Lasius myops care is understanding their founding strategy. These queens are temporary social parasites, meaning they can't start a colony on their own. In their natural environment, a Lasius myops queen will infiltrate an existing colony of a different Lasius species, usually killing the host queen and taking over her workforce. The host workers then tend to the parasitic queen's brood, gradually being replaced by Lasius myops workers. For hobbyists, this means you'll need to introduce your queen to host workers from a different Lasius species to get her colony started.
When setting up a parasitic Lasius colony, the number of host workers you introduce is incredibly important for success. While a wild queen might infiltrate a colony with thousands of workers, in captivity, a minimum of 30-50 host workers is recommended, but aiming for 100 or more is ideal. Having a robust host colony ensures the parasitic queen has enough support to raise her first generation of workers, preventing the colony from stalling out in its critical early stages. Without sufficient host support, the queen may not even begin laying eggs.
Lasius myops colonies, like many Lasius species, are known to tend aphids for their sweet honeydew. This behavior can be replicated in captivity by offering sugary foods like sugar water or honey. They also require a good protein source for their queen and developing brood. Providing a varied diet of small insects like mealworms, fruit flies, or crickets will keep your colony healthy and promote steady growth. Remember to avoid any food that might be contaminated with pesticides or other harmful chemicals.
These ants prefer nesting in subterranean environments, often under rocks or within soil and clay structures in the wild. This preference means that in a formicarium, they will spend a significant amount of time out of sight, working within their tunnels. While they may not be as active in the outworld as some other species, providing a naturalistic setup with appropriate substrate will make them feel secure and promote healthy colony development. You might observe more foraging activity once the colony is well-established and has a larger worker force.
Lasius myops, being a temperate species, requires a period of diapause, or hibernation, during the colder months. This is essential for the long-term health and reproductive cycle of the queen and colony. Typically, diapause should occur during winter, with temperatures lowered to around 5-10°C for a few months. Synchronizing this with the natural seasons is key, allowing them to rest and emerge ready for a new season of growth in the spring.
