Diogmites properans

Members of the genus Diogmites are distinguished from other robber fly genera by their characteristic "hanging thief" behavior—suspending from vegetation by their forelegs while feeding. They possess a relatively slender body form compared to some other large asilids. Specific identification of D. properans requires examination of morphological details including genitalia; the species was described by Bromley in 1936. Within the genus, species are distinguished by details of abdominal coloration, leg coloration, and male genitalic structure.

The species occurs in North America. The genus Diogmites is primarily distributed in the Americas, with most species occurring in the Nearctic and Neotropical regions.

Members of the genus Diogmites are known for their distinctive "hanging thief" behavior, whereby they suspend from vegetation by their front or middle legs while manipulating prey with the remaining legs. This behavior is a hallmark of the genus and has been well-documented in related species such as Diogmites neoternatus.

As a member of the Asilidae, D. properans functions as an aerial predator of other insects. Robber flies are generalist predators that capture flying insects in mid-air, contributing to the regulation of insect populations in their habitats.

Robber flies including Diogmites species are beneficial insects that prey on other insects, including some potential pests. They do not bite humans unless handled or trapped against skin. The genus has been featured in entomological literature and photography due to its distinctive behavioral traits.

• Diogmites neoternatusAnother large species in the same genus with similar "hanging thief" behavior; distinguished by specific details of coloration and size (D. neoternatus is noted as one of the largest robber flies with striking green eyes)
• Other Dasypogoninae genera (e.g., Microstylum)Similar large size and predatory habits, but Microstylum species lack the distinctive hanging behavior and have different mystax structure (confined to oral margin with stout bristles)
• Promachus speciesSimilar large size and predatory behavior, but Promachus species are generally more robust, lack the hanging thief behavior, and have different abdominal coloration patterns

• robber fly
• asilid
• aerial predator
• hanging thief
• North America

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• T.G.I.Flyday – Andrenosoma fulvicaudum | Beetles In The Bush
• T.G.I.Flyday | Beetles In The Bush
• Bug Eric: Robber Flies
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