April, 1889.] 241 



THE METAMOEPHOSES OP APATANIA MULIEBRIS, McLACH. : 

 A CHAPTEE IN PAETHENOGENESIS. 



BY PROP. FR. KLAPALEK. 



In the second half of October, 1886, when seeking the preparatory- 

 stages of Silo niqricornis, Pict., I found at a little spring with clear 

 and very cold water in the neighbourhood of Leitomischel in Eastern 

 Bohemia, numerous cases enclosing larvae and pup®, which I had 

 never seen before. I tried to rear the insect, but in vain. 

 The following year I found them at the same locality, and 

 at the same time, but in small number. It was only last year that 



I succeeded in rearing many of them, and 

 caught perfect insects sitting on the 

 plants on the margins of the spring. 

 Upon examining the pupae in the winter 

 of 1886 — 7, I felt sure they could only 

 be those of an Apatania, and the bred 

 insects confirmed this idea. I determined 

 them as A. muliebris, and Mr. McLachlan 

 is of the same opinion. 



The general appearance of the larvae 

 °' L blnLth? ° f Apatania muUebri *> is quite similar to that usual among the 

 6. the same from side : x 5. Lirnnophilidce . They are rather stout' 



cylindrical, 7 mm. long and 1'8 mm. broad. The head is broad-oval, 

 nearly spherical, brown with two darker spots on either side above the 

 eyes, and with many less dark dots on the crown and on the hind part 

 of the temples behind the eyes. The mouth parts are as in other 

 Limnopliilidcs. Pronotum almost quadrate, slightly narrowed pos- 

 teriorly, brown, excepting the anterior margin, and two large spots on 

 the posterior margin where it is paler ; the posterior margin is broadly 

 shining black. Mesonotum quadrangular, more than twice as broad 

 as long, brown with some darker dots. Legs brown, gradually in- 

 creasing in length, with strong claws. The lori (humps) on the first 

 abdominal segment rather large. Lateral line conspicuous, with grey 

 hairs on segments 2 — 7. Eespiratory filaments on segments 2 — 6. 

 The anal processes very short, two-jointed, with a strong, much-curved, 

 claw. 



The pupae are 6 mm. long by 1'8 mm. broad. Antennae as long as 

 the body. The mouth parts are on the whole the same as in other 

 Limnophilidce. Spurs 1, 2, 4. The anterior and posterior tarsi hair- 

 less, the intermediate longly ciliate. The dorsal part of the posterior 

 margin of the first abdominal segment is provided with two warts 



