76 THE EARLY STAGES OF TABANED^ 



Within the concavity of the mandibles the softer maxillae are placed. The ex- 

 tremity of the latter, curved hook-like in the same way, runs parallel with the 

 mandibles, so that to the observer from the side, two hooks appear superposed 

 one on the other. The maxillary palpus projects obliquely towards the outside 

 and above, and has a thick cylindric basal joint and a thinner simple terminal 

 joint of double length. Beginning with the third body segment, there appears a 

 short intermediate segment, on which rather long bristly hairs are inserted. On 

 the ventral side several circular protuberances with bristles are noticed on the 

 intermediate segment. ^^ The fourth to tenth segments show on the dorsal side 

 two, and on each side one spinous protuberance. The last segment has, on the 

 ventral side, the paired anal prominence, covered with finer and stronger hairs 

 and surrounded by a three-sided furrow. 



At the basal angles of the anal prominence small wart-like swellings appear. 

 From the last segment a respiratory tube, may be extended which is rather sharply 

 pointed and narrowly cone-shaped, showing at the tip a vertical fissure between 

 two thickenings, the endings of the main tracheae of the metapneustic larva. 



The pupa is a free pupa, and is found in the ground. 



The head of the pupa bears on each side above the base of the antenna a 

 small wart with a bristle, and above and below the antennal sheath, on the eyes, 

 similar but slightly smaller warts. B ehind the prothorax are the anterior spiracles, 

 placed on small cylindric prominences which do not project far. The wing and 

 leg cases reach the posterior margin of the first abdominal segment. 



Length of the larva: 27 to 30 mm.; width in the middle 4 mm. 



^'The German word used here is " Zwischenwulst" which means a swelling 

 lying between the segments. 



