\2 MISC. PUBLICATION 336, U. S. DEPT. OF AGRICULTURE 



I 



for the permanent collection. The upright model of this trap (fig. 

 6) is described by Mulhern (106). 



Adult specimens that are to be retained in the permanent collec- 

 tion should be mounted and pinned into a Schmitt box or similar 

 tight insect box having a bottom lining of sheet cork or balsa wood. 

 Freshly killed specimens may be mounted on minuten pins, and dry 

 specimens on paper points cut from stiff paper (fig. 7). In using 

 the paper mount, an entomological pin is passed through the base of 

 the narrow paper triangle and a small drop of cement is dabbed on 



the tip of the paper. 

 The paper is then 

 pressed gently onto the 

 side of the thorax of 

 the mosquito, with the 

 tip directed toward 

 the mesonotum. Care 

 should be taken not to 

 smear the legs or wings 

 with the cement. For 

 uniformity the points 

 are usually stuck onto 

 the left side of the 

 specimen. A cellulose 

 cement is preferable to 

 the shellac formerly 

 employed; it may be 

 purchased at hardware 

 stores in small tubes, 

 or it may be prepared 

 by dissolving celluloid 

 in amyl acetate 

 (known also as pear 

 oil or banana oil). 

 Because of the volatil- 

 ity of the amyl acetate 

 the stock of cement 

 must be thinned fre- 

 quently. In using the 

 minuten - pin mount, 

 the small pin is stuck 

 into a small square or 

 rectangular piece of 

 Figuee 6. — Mosquito light trap. cork, through which is 



also passed a larger 

 pin (fig. 7). The tip of the small pin is then thrust through the 

 thorax of the mosquito, usually from between the coxae toward the 

 back. The tip of the pin should not protrude through the mesonotum. 

 Very small, dry specimens may be stuck on the side of the minuten- 

 pin point with a drop of cement, instead of using the paper point. 

 The No. 3 entomological pin is probably the best general size for 

 use with both paper-point and minuten-pin mounts. 



Great care must be taken to protect the stored specimens from in- 

 sect pests, and for this purpose flake naphthalene and paradichloro- 



