( 291* ) 



DESGRIPTION OF PLATE XXVIII. 



Illustrating Mr. S. S. Saunders's Memoir on the Habits of the Dipterous Genus 

 Conops.— Vol. IV, p. 285—291. 



Fig. 1. — Pompilus audax, Smith, of the natural size seen from above, the 

 fourth and following segments of the abdomen removed, showing 

 the extremity of the abdomen of the inclosed parasitic imago of the 

 Conops (a). 



Fig. 2. — The three basal segments of the abdomen of the same Pompilus detached 

 and seen sideways. 



Fig. 3. — The cavity of the abdomen of the same seen from behind, showing the 

 parasite lying, rather obliquely on its back, within the abdomen of 

 the victim. 



Fig. 4. — Another specimen of the Pompilus seen from beneath ; the fourth and 

 following ventral segments of the abdomen removed, showing the two 

 rugose lobes at the extremity of the body of the larva of the Conops. 



Fig. 5. — The second, third and fourth segments of the abdomen of another speci- 

 men of the Pompilus separated, showing the two lobes at the extremity 

 of the body of the puparium of the Conops in situ(a), and the head 

 and the legs of the Conops perfect (6), already disengaged within the 

 base of the abdonien of the Pompilus. 



Fig. 6. — The larva of the Conops magnified. 



Fig. 7, a, b, c. — The anterior segments of the larva in diflerenl positions. 



Fig. 8 — The puparium of the Conops magnified and seen sideways, and lying on 

 its side within the abdomen of the Pompilus. 



Fig. 9. — The anteiior part of the puparium. 



Fig. 10. — The anal lobes of the puparium. 



Fig. 11. — The puparium seen from above, with the head piece ( 1 1 a) detached, 

 and with the delicate white envelopes of the real pupa of tlie Conops 

 seen protruding from the aperture, tiie Conops itself having escaped. 



Fig. 12. — The Conops dead, taken from the interior of the abdomen of the Pom- 

 pilus, with its wings unfolded. 



Fig. 13. — The perfect Conops. 



Fig. 14. — Odynerus(^.) (p. 291), with the third and following segments of the 

 abdomen detached. 



Fig. 15. — Two detached segments of the abdomen of the same (a, h), showing a 

 portion of the puparium of the parasitic Conops (c and d), which 

 extends into the basal segments of the abdomen of the Odyiierus, as 

 well as the two rugose anal lobes of the puparium. of the Conops 

 at (c). 



Fig. 16. — The immature Conops hatched from the Odynerus. 



J. O. WESTWOOD. 



