No. 4 ] GYPS r MOTII — APPENDIX . 423 



of clypeus strongly l)ilobed, each anterior angle bearing a 

 prominent spine ; top of the clypeus sliglitly hollowed 

 toward the dorsal line. The spines are the same in number 

 and arrangement as in the previous stages. Eyes near base 

 of antennte, not prominent. The antenna (Plate 3, Fig. 6) 

 are setaceous, short, four jointed, and arise from an eleva- 

 tion at the base of the mandibles. First joint short, cjdin- 

 drical and naked ; second joint nearly twice as long, slightly 

 clavate and bearing a short hair near the middle of the 

 outer margin ; third joint a little shorter than the second, 

 somewhat clavate and having one anterior angle slightly 

 produced, and bearing three spines, which arise near the 

 outer angles ; last joint as long as the first, nearly cylindri- 

 cal and bearing three spines at the apex. Mandibles large, 

 stout at base, with a prominent dorsal carina. A strong, 

 simple, blunt tooth (Fig. 9) arises near the base. The 

 mandible gradually tapers from the outermost insertion of 

 this tooth to a somewhat chisel-shaped point. The maxillae 

 (Fig. 8) are small, ferruginous in color, and are densely 

 covered with hairs and spines. They bear four-jointed, 

 naked palpi, which are nearly as long as the antenna?. The 

 three inner segments of the maxillary palpus are short, 

 stout, truncate and of nearly equal length ; the terminal 

 joint is slightly longer than the two preceding joints, ob- 

 long ovate in form and truncate at the tip. The galea or 

 inner lobe is naked, two jointed and as long as the three 

 basal joints of the palpus. Lacinia prominent and bearing 

 a spine at its apex. Labium (Fig. 7) small, somewhat hal- 

 bert shaped, with numerous spines arranged in an oval row 

 on the inner side. Palpi two jointed ; outer joint the longer 

 and truncate at tip. 



The dorsal thoracic plates are large, and nearly cover the 

 lateral thoracic walls, while the dorsal abdominal plates, 

 with the exception of the last, are smaller, and allow the 

 lateral walls of the abdomen to protrude. Dorsal line not 

 prominent. Each abdominal plate except the last bears, 

 near the })osterior margin, a very feeble transverse carina. 

 Spines arc arranged as in the preceding stage. The last 

 segment (Plate 4, Fig. 4) is relatively small, nearly trun- 

 cate behind ; the caudal appendages of moderate length, and 



