cephalad from the cephalic margin of the clypeus, is the 

 subquadraugular labrum. 



Compound eyes. — The compound eyes, on the lateral 

 margins of the head, are comparatively small. 



Ocelli. — There are no ocelli. 



Genae. — The portions of the epicranium ventrad of the 

 eyes and antennas are the gen cz and each projects cephalad, 

 latero- ventrad of the base of the mandibles, as a thin taper- 

 ing tongue curving slightly mesad at its tip. Ventrad of 

 this* projecting process, the gena presents a rounded 

 eniargination, and, filling in the emargination, may be seen 

 the basal portion of the maxillae. The genae form, with 

 portions of the occiput, the lateral portions of the ventral 

 surface of the head. 



Occiput. — The occiput, although fused with the epicran- 

 ium to form the firm head-box , is plainly separated from the 

 epicranium on the dorsal and lateral portions of the head by 

 an impressed line, which fades out on the lateral portions of 

 the ventral surface of the head, so that the genal and 

 occipital regions cannot here be distinguished. 



Gula. — Forming the mesal third of the ventral aspect of 

 the head, slightly widening caudad, and expanding at its 

 cephalic extremity to a narrow, transversal bar, which pro- 

 jects laterad to the genal "emargination, is the gula, one of 

 the head sclerites, which is wanting or is fused with the sub- 

 mentum in the head of the locust. The gula is usually a 

 well developed sclerite among beetles. The sutures separat- 

 ing it on either side from the contiguous portions of occiput 

 and epicranium (gena) are called the gular sutures. 



Make a drawing of the ventral aspect of the head, show- 

 ing the skeletal parts described, and also what may be seen 

 of the mouth parts in situ. 



