Volume 80, 1952
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Cydnidae
The Cydnidae (“burrowing bugs”) may be distinguished from all other families of Heteroptera by the following combination of characters terrestrial; scutellum large, reaching to or exceeding posterior end of clavus; body ovoid, not extremely flattened; tibiae with numerous long spines.
| 1. Small (4–5 mm. long); light brown, marked with black on median band on head, on calli and two spots behind them, three patches on base of scutellum and one at apex, and spots on corium; coarsely punctate over whole dorsal surface | Choerocydnus nigrosignatus Buch. White (Figs. 2, 17, 25) |
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| Larger (6–7 mm. long); colour not as above; punctation of most of dorsal surface fine and sparse | 2 | |
| 2. Brown; pronotum with a transverse groove delimiting a distinct anterior border; if really a N.Z. species, rare | Pangaeus scotti Signoret | |
| Black; pronotum without such a distinct anterior groove and border; common | Philapodemus australis (Erichson) (Figs. 1, 18, 24) |