Dipogon calipterus
(Say, 1836)
spider wasp
Species Guides
1Dipogon calipterus is a small spider wasp in the Pompilidae. Females hunt spiders on tree trunks, sting them into paralysis, and provision underground nests with them. The exhibits -mimicry through dark wing bands and is rarely observed due to its cryptic appearance and . Three are recognized with scattered distributions across eastern and southern North America.
Pronunciation
How to pronounce Dipogon calipterus: //dɪˈpoʊ.ɡɒn kæˈlɪp.tər.əs//
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Identification
The combination of wooded , banded wings, and reddish front legs distinguishes D. calipterus from other Dipogon . The hairy maxillary palps are diagnostic for the but require close examination. Similar spider wasps lack the distinct wing banding pattern and reddish leg coloration.
Appearance
Small with dark-banded wings that create an -like appearance. Males have forewing length of 5 mm; females 5.7–7.4 mm. Reddish front legs distinguish this from . Hairy maxillary palps form a 'beard' used to transport nest materials, though this trait is rarely visible on live specimens.
Habitat
Forest edges and wooded areas. hunt on tree trunks, foliage, flowers, and stems. Males perch on sunlit leaves to defend territories and seek females.
Distribution
Three recognized with scattered ranges: D. c. calipterus from Massachusetts to North Carolina, Indiana, and Illinois; D. c. duplicatus in Georgia and Florida; D. c. nubifer from southern California to Panama. Distribution knowledge remains incomplete.
Seasonality
Active in summer; observed in Indiana in late June.
Diet
Females hunt spiders including crab spiders (Thomisidae, especially Xysticus), jumping spiders (Salticidae), ground spiders (Gnaphosidae), and hacklemesh weavers (Amaurobiidae). Females occasionally kill prey to feed themselves rather than provisioning nests.
Life Cycle
Females construct nests in pre-existing tubular cavities such as abandoned tunnels or soft pith in dead plant stems (including sumac). Linear cavities are divided into using mud and debris partitions. Each cell receives one paralyzed spider, an , and a partition ceiling that becomes the floor of the next cell. Nest partitions incorporate mud, leaf particles, insect parts, and caterpillar .
Behavior
Males perch on leaves to defend territories and locate females. Both sexes groom and rest on sunlit leaves. Females hunt by searching tree trunks, sideways or backwards while dragging paralyzed spiders by the . Prey is stung into deep paralysis or killed outright. Females likely locate nest sites before hunting.
Ecological Role
of spiders. Nest cavities in dead wood and stems contribute to decomposition processes. -mimicry may reduce pressure.
Human Relevance
May use pre-drilled wood nest blocks intended for solitary bees. Occasionally encountered by naturalists at forest edges. One specimen contributed to discovery documentation.
Similar Taxa
- Other Dipogon speciesLack reddish front legs; may have different wing banding patterns
- Ants (Formicidae)D. calipterus mimics ants through dark wing bands and , but has body plan and wing structure
More Details
Ant-mimicry function
Dark wing bands create visual resemblance to ants, likely reducing from -averse . This mimicry, combined with frequent ant traffic on tree boles, makes these difficult to detect.
Subspecies differentiation
segregated by slight differences in color and pattern: D. c. calipterus (northeast/midwest), D. c. duplicatus (Georgia/Florida), D. c. nubifer (southwest to Panama).
Unique nest characteristics
Conglomerate partitions and closing plugs incorporating diverse materials (mud, leaves, insect parts, caterpillar ) are distinctive for the and aid in nest identification.