144 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 43. 



Fig. 3.— Wings of Oryssus abietes. 



Wings. — Wings as in figure 3. In some exotic genera the anal cell 

 is broadly contracted, there being a very small basal cell present. In 

 certain exotic genera the cubitus joins the costa at the same place as 

 the basal vein, and does not join the basal vein as in Oryssus. 



Legs. — The legs, 

 contrary to the usual 

 rule, show much 

 modification in the 

 female, wliile in the 

 male they are of the 

 usual type. In the 

 male the legs are 

 as follows: Coxsb 

 rather large, all of 

 them contiguous; 

 trochanters long, 

 the posterior ones 

 2-jointed, the basal 

 division being the 

 longer; femora stout; tibiae rather slender, armed apically with one 

 calcarium although the second calcarium on the two posterior pair 

 is often represented by rudi- 

 ments, the four posterior ones 

 enlarged apically and some- 

 what curved, the posterior 

 ones simple or serrate on their 

 outer edge; tarsi long, slen- 

 der, longer than their tibiae, 

 pulvilli wanting, empodia 

 present but not large, claws 

 with an erect inner tooth. 

 In the female the legs differ 

 from the male as follows: 

 Four posterior legs differing 

 only in the rather shorter 

 tarsi; anterior tibiae irregu- 

 lar in outline, the calcarium 

 bifid apically; anterior tarsi 

 3-jointed, the basal joint dis- 

 tinctly longer than the two 

 following. (See fig. 4.) 



Abdomen. — The abdomen, which is cylindrical, is composed of eight 

 tergites and eight sternites. The first tergite is called the propodeum 

 and is undivided. The first two tergites are more coarsely sculp- 

 tured than the following and are separated from each other by a 



Fig. 4.— Legs of Oryssus. (a) Foreleg of O. abietes, 



FEMALE FROM THE COXA; (6) FORELEG OF 0. SAYIl MALE 

 FROM THE APEX OF TUE FEMORA. 



