What is the texture characteristic of Bostrichid type of frass?

The characteristic texture of Bostrichid frass is indeed more coarse than that of Lyctid frass, and it tends to stick together in clumps. This is primarily due to the nature of the wood that Bostrichids infest, which typically results in a more fibrous frass. Bostrichid beetles, commonly known as woodboring beetles, produce this type of frass as they chew through wood to create tunnels for their larvae. The frass is composed of small wood particles mixed with fecal matter, which gives it a clumpy appearance rather than a fine or powdery texture.

In contrast, Lyctid frass is much finer and does not clump together. The other types of frass mentioned, such as soft and fluffy or granular and scattered, would not accurately describe the nature of Bostrichid frass. Therefore, recognizing the clumpy and coarse texture is crucial for identifying the presence of Bostrichid infestations.