BIML Update - Photos, state records, Megachile
Tracy Zarrillo, Deana Crumbling, Denise Williams, Ellen Bulger, and Nancy Adamson are all adding photos to the DL website from their own picture taking and from cooperators from Bugguide. If you have pictures of bee species not found in Discoverlife or would like to illustrate any of the guides feel free to contact Sam Droege (sdroege@...). Thanks to everyone.
New State Records
Andrene rudbeckiae - Delaware, Heather Harmon
Osmia chalybea - Delaware, Heather Harmon, from coastal Fenwick Island
M. brevis, M. pruina, M. texana
M. brevis - Sides of T3 and T4 usually without any stiff upright black hairs, but in the Deep South and Florida some may be present in M. brevis pseudobrevis, which is likely to become a full species in the future - T6 with almost no short, bright white, appressed hairs, the surface clearly visible throughout - S6 in Eastern populations with WHITE HAIRS throughout except for black hairs along the rim, the density of hairs lessens in the center of the segment but no clear bare patch is present - Mandible with only a partially complete cutting edge between the 2nd and 3rd tooth from the front, see illustrations on species page - In direct comparison clearly smaller - VERY COMMON AND WIDESPREAD
M. pruina - Sides of T2 - T4 with many, clearly visible, stiff upright black hairs- T6 with a nearly complete coat of short, bright WHITE, COMPLETELY APPRESSED hairs are regularly spaced and do not overlap one another that almost hide the surface - S6 with black hairs throughout but with most of the center of the segment clearly and obviously BARE OF ANY HAIRS - Mitchell mentions that the mandible has a complete cutting edge between the 2nd and 3rd tooth and while this is true in some individuals but many also have only a PARTIAL CUTTING TOOTH - Unique in having black hairs in the center of the cypeus, but these often wear away in older specimens - In direct comparison CLEARLY LARGER than the other two - RARE AND LARGELY SOUTHERN COASTAL
M. texana - Sides of T2 - T4 with many, clearly visible, stiff upright black hairs - T6 can have white hairs that are prone, but these are long, many overap one another and usually are restricted to the apical half or so of the segment - S6 with black hairs throughout except for black hairs along the rim, the density of hairs lessens in the center of the segment but no clear bare patch is present - Mandible with only a partially complete cutting edge between the 2nd and 3rd tooth from the front, see illustrations on species page - In direct comparison smaller than M. pruina but larger than M. texana - Widespread, regular, but spotty in occurrence
Hand sanitizer for display of specimens
We have continued to work on using hand sanitizer to display insects and have the following updates
1. Salt completely destroys the gel matrix
2. Cuvettes create fantastic holders for specimens and allow wonderful microscope views and photographs
3. Worms and isopods display nicely once they have been alcohol
Sam Droege sdroege@...
w 301-497-5840 h 301-390-7759 fax 301-497-5624
USGS Patuxent Wildlife Research Center
BARC-EAST, BLDG 308, RM 124 10300 Balt. Ave., Beltsville, MD 20705
A foolish consistency is the hobgoblin of little minds.
- Ralph Waldo Emerson