Supplementary Tables (single file)
Table S1. Abbreviations for methods used to detect cryptic species. 
Table S2. Data types, estimated number of species, and species delimitation methods used in each study (for studies with nuclear data).
Table S3. Data types, estimated number of species, and species delimitation methods used in each study (for studies with mitochondrial data only).
Table S4. Number of sampled individuals in each study (from studies with nuclear data).
Table S5. Number of sampled individuals in each study (for studies with mitochondrial data only). 
Table S6. Number of morphology-based and cryptic species in each study (including only studies with nuclear genes).
Table S7. The numbers of described species in each insect order.
Table S8. Cryptic species revealed by mitochondrial data alone, including all studies (regardless of sample size).
Table S9. Estimated number of cryptic species revealed by mitochondrial data alone, excluding studies with low sample sizes per species.
Table S10. The mean ratio of molecular to morphology-based species, averaged among genera within each order, based on studies with mitochondrial data only and adequate sample sizes.
Table S11. Data types, species delimitation methods, and estimated species from each study (for studies with nuclear data), based on the minimum estimated number of species per study (among different methods).
Table S12. Data types, species delimitation methods, and estimated species in each study (for studies with nuclear data), based on the maximum estimated number of species per study (among different methods).
Table S13. Number of morphology-based and cryptic species in each study (including only studies with nuclear genes), using the minimum estimated number of cryptic species per morphology-based species.
Table S14. Number of morphology-based and cryptic species in each study (including only studies with nuclear genes), using the maximum estimated number of cryptic species.
Table S15. The mean ratio of molecular to morphology-based species, averaged among genera within each order, excluding studies that obtained molecular data for 10 or fewer individuals per morphology-based species, and using the minimum estimated number of species in each study.
Table S16. The mean ratio of molecular to morphology-based species, averaged among genera within each order, excluding studies that obtained molecular data for 10 or fewer individuals per morphology-based species were excluded, and using the maximum estimated number of species per study.
Table S17. The mean ratio of molecular to morphology-based species, averaged among genera within each order, excluding studies that obtained molecular data for 5 or fewer individuals per morphology-based species.
Table S18. The mean ratio of molecular to morphology-based species, averaged among genera within each order, excluding studies that obtained molecular data for 20 or fewer individuals per morphology-based species.
Table S19. Estimated latitudinal distribution of each genus.
Table S20. The mean ratio of molecular to morphology-based species (based on nuclear data), averaged among genera within each order, after excluding studies that included only a single species.

Separate Files
Dataset S1. Summary of the latitudinal distribution of the 93 included species
Dataset S2. Localities used to estimate the latitudinal distribution of each species.