Ptiloglossa Smith 1853

Figures 8–18.Ptiloglossa tarsata (Friese, 1900). 8 General view of the nesting site at “La Florida” (Salta province), the arrow indicates the location of the nest; 9 Female of Ptiloglossa tarsata foraging in a flower of Solanum sp. 10 Tumulus of unconsolidated soil, scale line: 1 cm 11 General view showing the nest architecture with a cell at the end of the main tunnel 12 Group of scratches probably produced by female´s mandibles. The arrow indicates their location in the main tunne; 13(a) cell with cellophane-like lining and provisions, (b) neck and (c) entrance tunnel, scale line: 1 cm 14 One cell showing the cellophane-like lining on the wall, scale line: 1 cm 15 Spiral closure of one cell, scale line: 0.5 cm 16 Cocoon operculum with holes, scale line: 0.5 cm 17 Scanning electron micrograph of the cocoon operculum showing the fabric of silk threads with small circular holes, scale: 500 µm 18 Onecircular hole surrounded by silk threads, scale: 50 µm.

Figures 24–29.Ptiloglossa matutina (Schrottky, 1904). 24 General view of the nesting site at Reserva Karadya, Andresito (Misiones province) 25 Nest entrance closed by a plug of soil(arrow), scale line:1 cm 26 Soil with roots, litter, some rocks, and remains of the main tunnel (arrow) 27 Cell showing the larva partially submerged in provisions, cellophane lining, and the wad cotton-like material attached the cell closure, scale line: 0.5 cm 28 Detail of the cell closure with the cotton-like material 29 Cell and neck wall with the lining removed. Note the high curvature.

Figures 19–23.19 Nest architecture of Ptiloglossa tarsata (Friese, 1900). 20 Cell with provisions and egg, cell neck, spiral closure, and entrance tunnel of Ptiloglossa tarsata 21 Nest architecture of Ptiloglossa matutina (Schrottky, 1904) 22 Nest architecture of Cadeguala albopilosa (Spinola, 1851) 23 Cell with provisions and egg, cell neck, location of the cell closure and entrance tunnel of Cadeguala albopilosa.

Figures 19–23.19 Nest architecture of Ptiloglossa tarsata (Friese, 1900). 20 Cell with provisions and egg, cell neck, spiral closure, and entrance tunnel of Ptiloglossa tarsata 21 Nest architecture of Ptiloglossa matutina (Schrottky, 1904) 22 Nest architecture of Cadeguala albopilosa (Spinola, 1851) 23 Cell with provisions and egg, cell neck, location of the cell closure and entrance tunnel of Cadeguala albopilosa.

Dorsal. Specimen ID: 1704394. Field no.: BCI18515. Taxon rep.: Ptiloglossa sp. 1YB. Image quality: 3. Aspect ratio: 1.105.

Lateral. Specimen ID: 955897. Field no.: MEXRA054. Taxon rep.: Ptiloglossa wilmattae. Image quality: 1. Aspect ratio: 1.499.

Dorsal. Specimen ID: 2090591. Field no.: PCYU-NSV:06021. Taxon rep.: Ptiloglossa sp. 1nv. Image quality: 1. Aspect ratio: 0.733.

Dorsal. Catalog no.: PCYU-NSV:05145. Specimen ID: 2090590. Field no.: PCYU-NSV:05145. Image quality: 1. Aspect ratio: 0.733.

Dorsal. Catalog no.: PCYU-NSV:06021. Specimen ID: 2009951. Field no.: PCYU-NSV:06021. Taxon rep.: Ptiloglossa ARG02. Image quality: 3. Aspect ratio: 0.667.

Dorsal. Catalog no.: PCYU-NSV:05372. Specimen ID: 2012735. Field no.: PCYU-NSV:05372. Image quality: 1. Aspect ratio: 0.667.

Lateral. Catalog no.: USNMENT01453824. Specimen ID: 9399554. Taxon rep.: Ptiloglossa eximia. Image quality: 1. Aspect ratio: 1.331.

Lateral. Catalog no.: USNMENT01453825. Specimen ID: 9399555. Image quality: 1. Aspect ratio: 1.333.

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