Dec. is, 1920 Tamarind Pod-Borer, Sitophilus linearis (Herbst) 445 



The palpus is 2 -jointed and bears a single seta near the apex of the first 

 segment. There are three other setae found on the maxilla, two located 

 on the vaginant membrane between the palpus and palpifer, and one 

 stouter and longer seta midway between the palpus and cardo. There is 

 no articulating maxillary area between the maxilla and the mental- 

 submental region. 



The submentum and mentum are fused and are represented by a broad 

 lobe bearing three pairs of stout setae. The stipes labii are posteriorly 

 enforced by a median, trangular chitinization ; the anterior median sec- 

 tion is produced anteriorly between the palpi into a small lobe-like ligula' 

 which is fused with the lingua. Each stipes labii bears a single seta. The 

 short, conical, 2 -jointed palpi are situated on the anterior angles of the 

 stipites. The ligula bears four small setae. 



The prothorax is dorsally not divided; but two areas, the praescutal 

 and scutoscutellar areas, are roughly indicated by rows of setae. The 

 mesothoracic and metathoracic segments are above divided into two 

 distinct areas, the anterior of which represents the praescutum and the 

 posterior the scuto-scutellum and alar area. The thoracic spiracle is 

 located on a lobe pushed into the prothorax from the epipleurum of the 

 mesothorax. It is bifore, elongate, larger than the abdominal spiracles, 

 and placed with the finger-like air tubes pointing dorsad. The meta- 

 thoracic spiracle is rudimentary. 



There are 10 abdominal segments, the first 7 similar, the last 3 smaller 

 and reduced. Each of the abdominal segments 1 to 8 is supplied with 

 a spiracle, that of the eighth being located more dorsally than the rest. 

 Each tergum is divided above into two distinct areas. The first contains 

 praescutal and scutal elements; the second represents the scutellum. 

 Below these two areas and adjacent to the epipleurum is the alar area. 

 The abdominal spiracles are placed anteriorly and in a little separate 

 corner piece, probably of the alar area. 



Below a very indistinct and abrupt dorso-lateral suture and above a 

 well-defined ventro-lateral suture is a large, not subdivided epipleurum. 

 The abdominal epipleura are located considerably higher than the 

 thoracic, and the ventro-lateral suture makes an S-shaped line between 

 metathorax and first abdominal segment. Below the ventro-lateral 

 suture is the hypopleurum subdivided into three lobes, one right under 

 the other. Below the hypopleurum is the coxal lobe, and below that is 

 the sternum, consisting of the eusternum and a posterior triangular area 

 representing the parasternum or the parasternum fused with the ster- 

 nellum. 



The setae on the abdominal segments are arranged as follows : One on 

 the praescutum, a long and two shorter ones on the scutellum, two on 

 the alar area located just above the spiracle, two on the epipleurum, one 

 on the middle lobe of the hypopleurum, one on the coxal lobe, and three 

 on the eusternum. One of the hairs on the scutellum is sometimes 

 missing on the last few abdominal segments. 



