Zonitis cribricollis

Distinguished from other Zonitis species by the cribrate (sieve-like) punctation of the pronotum. Members of Nemognathinae can be separated from other meloid subfamilies by their elongated, nectar-feeding mouthparts. Within Zonitis, comparison with Z. sayi, Z. dunniana, Z. bilineata, and Z. vittigera requires examination of pronotal punctation density and pattern, elytral coloration, and antennal proportions. The species has been collected in association with flowers of Heliomeris longifolia.

Adults are elongate beetles typical of the genus Zonitis. The specific epithet 'cribricollis' (from Latin cribrum = sieve, collis = neck/collar) indicates a distinctly punctured or reticulate pronotum with numerous small pits or depressions. Body coloration and detailed morphology require specimen examination.

Found in desert and semi-arid environments. Adults have been observed on flowers of yellow composites (Asteraceae), specifically Heliomeris longifolia. Habitat includes areas with blooming composite flowers in southwestern North American deserts.

North America, with records from the southwestern United States including Arizona. The species occurs in desert and semi-arid regions where its host flowers are present.

Adults active during summer monsoon season when host plants are in bloom. Records from July and August in Arizona suggest peak activity coincides with flowering of Heliomeris longifolia and related composites.

Adults feed on nectar and pollen of flowers, particularly yellow composites (Asteraceae). Larval diet unknown but likely parasitoids of ground-nesting bees or grasshopper egg pods based on family-level biology.

• Heliomeris longifolia - adult food sourceAdults collected on flowers

Complete metamorphosis with hypermetamorphic larvae typical of Meloidae. First instar larvae (triungulins) are likely active and seek out hosts. Subsequent instars are grub-like and presumably parasitic. Specific host records for larvae are not documented.

Adults are diurnal flower visitors. Like other Nemognathinae, they use elongated maxillary mouthparts to access nectar via capillary action along bristle-covered galeae rather than true sucking. Adults are likely strong fliers given their association with patchily distributed desert flowers.

Adults function as pollinators of composite flowers while feeding on nectar and pollen. Larvae may serve as biological control agents of grasshoppers or bees, though specific ecological impacts are undocumented.

Like all blister beetles, contains cantharidin and is toxic if ingested. No specific economic importance documented, but general meloid toxicity warrants caution in handling. Of interest to coleopterists studying Nemognathinae systematics and flower-feeding adaptations.

• Zonitis sayiSimilar size and general appearance; distinguished by pronotal punctation pattern and elytral markings
• Zonitis dunnianaOccurs in same region and on similar flowers; separated by pronotal sculpture and body proportions
• Zonitis bilineataSympatric species with different elytral pattern (two longitudinal stripes vs. cribricollis pattern)
• Zonitis vittigeraSimilar habitat use; distinguished by pronotal and elytral characters

• Meloidae
• Nemognathinae
• blister beetle
• flower-feeding
• desert beetle
• North America
• Arizona
• cantharidin
• hypermetamorphosis

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• Meloidae Holdings | Entomology Research Museum
• Pedantic Sunday: Blister beetles don’t suck | Beetles In The Bush
• pleasing fungus beetles | Beetles In The Bush
• Halictidae | Beetles In The Bush