42 



INTRODUCTIOX To /.OOLOIJY. 



THK HOUSi: FI>V. 



1. Tdciitify the hody divisions. 



2. ()a tlie head, find tlie eyes, cxudli, anteniite. 

 Draw tlie antenii?e. 



:]. Kxa.niinc tlie so-called ''tongue," or proboscis. 

 Idciitifv the ])alin, the labellffi, or large flap at the 

 ti[), the sheath, and the lancets within the sheath. 



4. Identify the s(\gnients of the log. Study tlic 

 foot carefully. I>i'a\\'. 



o. Find the wings. How many? 8ee the back- 

 \\ard extension of the wing, which is called the alula, 

 (.)r winglet. Study and di'aw the wing carefully. 



(). ]>ack of the wing, fiml on each side a knob 

 borne on a stalk. These knobs ar(> known as the 

 balancei's. Judging from their position, to what arc 

 they lioraologous'.'' 



7. Are there spiracles on the thorax? 



8. How many segments has the abdomen? How 

 many spiracles do you And? 



9. 'I'he lai'va. is called a maggot. Where can it bo 

 found? What kind of mrtamorphosis has the fly? 



Mi< r<>sc<>i»i<' ( >l).j<'<(s. 



Witli tlui exre]itioii of tlie inax- 

 illaiy palpi, the mouth parts of 

 the llv are modified into a pro- 

 hosi-is wldch constitutes a suck- 

 ing; and ]iiercinK orj^an. When 

 not in iisc, it is folded up under 

 the head. 



PKiiiJO.SI IS *.Hi' I'l.V. 



