348 



ELEMENTARY ENTOMOLOGY 



FIG. 483. Showing 



method of pinning 



Coleoptera 



(After Washburn) 



mounted on elbow pins, or on bits of fine silver wire (minutien- 



nadcln\ which are stuck through bits of cork or pith and pinned 



like a cardboard point. 



Diptera. In the Diptera the pin is run through the central part 



of the thorax, and the wings, if not spread, should be extended. 



In the long-legged flies, as the crane-fly, the 

 legs should be supported until the specimen 

 is dry. In fact, it is not a bad idea to place a 

 permanent piece of cardboard on the pins hold- 

 ing such specimens. The smaller Diptera are 

 usually mounted on wire or cardboard points. 



Coleoptera (Fig. 483). All of the larger Cole- 

 optera are pinned through the anterior inner 

 portion of the right wing-cover. 

 The wings are never spread, 

 and but little attention need be 

 given the specimens after pin- 

 ning, as the legs usually adjust 

 themselves. The smaller forms 



are mounted on cardboard points and should be 



glued on the side to reveal the undersurface. 

 Hymenoptera (Fig. 484). These are pinned 



through the metathorax ; the wings may or may FIG. 484. Showing. 



not be spread. Some of the more slender forms, method of pinning 



Hymenoptera 



as the Ichneumon-flies, require a support until 



. . TT (After Washburn) 



they are dry. Many of the parasitic Hymenoptera 

 are mounted on slides in Canada balsam, but the usual way is to 



mount on points, 

 either cardboard or 

 wire. 



Mounting insects 

 on points. General 

 directions have al- 

 ready been given 

 for mounting insects on points. It may be well, however, to men- 

 tion some of the different types of points used in mounting insects. 

 Micro-pins (Fig. 486, d) are largely used for mounting Lepidoptera, 

 Neuroptera, and Diptera. These micro-pins (minutien-nadeln) 



FIG. 485. Point punch 



