344 ORISMOLOGY. 



. TEGMINA. 



1. FENESTRELLA (Fenestrella). A transparent eye-like 



spot in the Anal Area of the Tegmina of Acrida 

 J a . 



2. CONVOLVENT (Convolventia}. When the Anal Area 



is horizpntal, incumbent on the back of the insect, 

 and forms a rightf angle with the rest of the teg- 

 men, which is vertical and covers the sides. Ex. 

 Locusta. N.B. In this case the Anal Area of one 

 Tegmen covers that of the other. 



3. ALIFORM (Aliformia). When their substance ap- 



proaches to membrane, and they nearly resemble 

 Wings. Ex. Most Homopterous Hemiptera. 



J. HEMELYTRA. 



1. DETECTED (Obtecta). When the Hemelytra are 



covered by a scutelliform mesothorax. Ex. Scu- 

 tellera. 



2. DETECTED (Detccta}. When they are not so co- 



vered. Ex. Most Heteropterous Hemiptera. 



6. WINGS (AI&}. 



A. Denomination. 

 1. ANTERIOR (Antica}. The fore or upper wings. 



a. SUPERIOR (Superiores). The anterior wings are so 



denominated if when at rest they are placed upon 

 the posterior wings. Ex. Hymenoptera. 



b. PRIMARY (Primores). The anterior wings are so 



denominated if when at rest they are not placed 



a For the reason of this change of the name of Locusta F., see 

 Zoo/. Journ. N iv. 



An Acrida with this spot is figured by Professor Lichtenstein. 

 Linn. Tram. iv. t. v. A. 



