abdomen can be glued to the point behind the specimen. The tegmen and median lobe

are compressed and held together by the tegminal (lateral) struts. To separate these two

parts, a minute was wedged between the median lobe and the tegminal strut breaking

one lobe of the tegminal strut, and separating the two pieces. In some cases, the internal

sac can be removed, and the tegmen can be moved backwards sliding both tegminal struts

over the posterior portion of the median lobe as well as the median strut, effectively

separating the two parts without damaging the tegminal struts, the median strut, or the

dorsal piece of the tegmen. The median lobe and tegmen (basal plate) can then be slide-

mounted or, to avoid distortion, mounted on a point in dimethyl hydantoin formaldehyde

(DMHF). This solution is water soluble and dries clear. If possible, genitalia should be

mounted on very shallow depression slides to avoid distortion (Fig. 6, 19, 32). This is

especially true of a median lobe with a large and raised median plate.

 Specimens were cleared in 10% KOH at 24C in preparation for disarticulation.

After 24 hours, beetles were sufficiently cleared and softened for dissection. Due to their

convex body form and very small size, specimens were disarticulated in glycerine. All

disarticulated parts, including genitalia, were then washed in 95% ethanol and mounted

on microscope slides using Hoyer's solution. Label data were copied onto slides

verbatim with label breaks indicated by a slash (/).

 Definitions

Median lobe (Fig. 4-1): Also referred to as penis (Endr6dy-Younga 1968, 1971a, 1971b;

Kirejtshuk et al. 1997; Lupi 2003; Yu 1995a, 1995b).

Basal plate (Fig. 4-1): This is a reference to the basal plate of the tegmen (Endrody-

Younga 1968, 1971a, 1971b; Lupi 2003; Yu 1995a, 1995b).