42 Journal of Agricultural Research voi. xix. no. i 



The epicranial areas are located on each side of the epicranial suture (PI. 9, C-E). 

 A pair of light lines depart from the frontal sutures and pass backward almost as far as 

 the light median line of the epicranium, corresponding to adfrontal sutures which 

 sometimes occur in the Rliynchophora. Each lobe of the epicranium bears setae as 

 follows: One at each terminus of the rudimentary adfrontal suture; a small one 

 opposite the middle of the frontal suture, and a longer one behind this almost equi- 

 distant from the epicranial suture ; a long hair opposite the basal third of the frontal 

 suture; one opposite the middle of the pleurostoma; one near the hypostomal angle 

 of the mandible; one opposite the basal third of the hypostoma; one on disk behind 

 this; and four tiny ones on the disk near the median basal angle of the lobe. 



The antenna is a fleshy 2 -jointed appendage located at the lateral angle of the frons 

 (PI. 9, D); the first joint is broad and short and bears one or more tiny hairs; thesecond 

 joint is slender, finger-like, but short. The mandibles (PI. 9, D, E) are very dark 

 brown, bidentate, with median and basal hairs. The clypeus (PI. 9, D) is attached in 

 front of the frons and is basally marginated with dark brown, but otherwise light in 

 color. It bears four tiny hairs on the epistomal margin. The lab rum (PI. 9, D) is not 

 so broad, is rounded in front, has a row of four setse in front of the middle, and is mar- 

 gined with setae. The maxillae (PI. 9, D, E) are elongate, terminated by a 2-jointed 

 palpus and a setose lacinia. They are provided with four setae, two near palpus 

 and one near base. The stipes labii (PI. 9, D, E) is triangular cordate, rather acutely 

 angulate at base, bearing 2-jointed palpi at basal angles with a discal pair of setse 

 and with several pairs of basal setae. 



The body is glabrous except for the usual hairs found on each segment (PL 9, B). 

 The prothorax is not divided dorsally on the anterior margin, which corresponds to the 

 praescutum. There are six pairs of setae, the last of which occiu-s in the region of the 

 alar lobe. Behind these on the scutal area are four pairs of hairs, the last of which oc- 

 curs on the alar lobe. The mesothoracic spiracle occurs on a large lobe which causes 

 an emargination of the prothorax and lies very close to the head. It is very elongate 

 with a longitudinal slit. The mesothorax and metathorax dorsally consist of a spindle- 

 shaped praescutum with a single pair of setae and the scutellum, extending from alar 

 lobe to alar lobe and bearing only two pairs of hairs in the region of the alar lobe . The 

 epipleurum of the mesothorax and metathorax bears a single hair. Each hypopleural 

 lobe bears two setae. The sternum of the thorax consists of a median area or eustemum 

 and two lateral lobes more or less connected medianly behind the sternum. The 

 median portion is the stemellum and the lateral portions are the parasternal plates. 

 Each thoracic sternum bears one pair of hairs, and each parastemum bears three pairs 

 of hairs. 



The first seven abdominal segments are normal, and each bears a very minute spira- 

 cle. In a fully matured specimen these segments grow larger to the fourth or fifth 

 segment and then decrease in size. The seventh segment is the smallest of the normal 

 segments. Dorsally each segment is transversely divided into foiu* parts, praescutum, 

 scutum, scutellum, and postscutellum. Each praescutum bears one pair of setae and 

 each scutellum bears a small lateral pair. Each epipleural lobe bears two pairs of 

 seta; and each hypopleural lobe is apparently longitudinally divided into two parts, 

 the lower of which bears a single seta. Ventrally, each segment has two transverse 

 lobes, the front one being the eustemum with the presternum depressed in front of it 

 and the parastemum and lobe at each side. The second transverse area is transversely 

 depressed and frontally consists of stemellum and poststemellum. There are no setae 

 on the sternum of the abdomen. The eighth segment is dorsally greatly modified with 

 a single pair of hairs on the praescutum and a single pair on the scutellar area, and with 

 very elongated spiracles quite prominent (PI. 9, F, G). Just outside of the spiracles 

 on the epipleural lobe are two strong setae. 



The dorsal face of the eighth segment is declivous (PI. 9, B) ; the dorsum of the ninth 

 segment is flattened and bears four pairs of setae, as shown in the figure (PI. 9, F). The 



