14 
LYCiEYA IL, III. 
with dissections. I had asked Dr. Hunt whether there were snccbd „i„ , 
neath the membrane of 11, and an opening at the top of the vesicle. 8 Neither 
7 01 WaS d ‘ scovered ' The fluid appeared to exude through min e 
of 12 ^ **" between'tke £ 
Dr. Aug. Weismann wrote: “ You should try and observe what enemies the 
larvae have It * conceivable that there are such enemies as are afraTd of a„ts ’ 
Spe f 6S ° f P ara si‘es about these larvm. One is dipterous, a Ta- 
ia fly. This deposits eggs on the slun of the larva in second larval state and 
on the second or third segment. As the grubs hatch, they eat their way through 
, k ’ ant emer § e when ful1 grown in the last larval stage, and mak/for them 
elves a hard pupa case, out of which in a few days combes a fly. Two othe« 
co~r&y° U Th n e "“""n, 0,16 "• Pr ° f ' RiI ^ as A P a > Me ° 
congregates bay The eggs of these species are deposited singly within the very 
young larvae, and the grub eats its way out when the larva is but half grown and 
p oceeds to spin for itself a cylindrical cocoon of yellow silk, from which in a few 
days the perfect insect will break forth. The fourth parasite is also hymenopte- 
us, an Ichneumon fly, a species of Anomalon, as Mr. E. T. Cresson tells me. 
Ti l , PPCa T- the Iarva on, y >» tlle last or perhaps the last two stages 
T lie ruction of larvm by these and other parasites is immense. If any of 
cm attack the mature larva, as the Anomalon does, the grub will pass fnto 
buttei-llvT ]o o' 1 ' de ®^ ro y that, and multitudes of chrysalids of different species of 
^tei fly so perish. But our Lycama appears to be singularly free from para- 
n S l’ 1 f 10 pUpa Sta ° e ’ and Indeed 1 have never lost one from such cause. Why 
t .s so favored will perhaps appear from the incident I relate. On 20tl, June 
to 1 ’ t li ll V n 0 d S ’l SaW a ma l Ure krVa 011 Ra ‘t'®-weed, and on its back, facing 
one of he e An “ ' \ ‘ W ° inches behind ’ 011 the was 
krva 5 beift t m T ’ r a n C m n ? itS ChanCe t0 thnwt itS ovi P os *f° r into the 
either of the • stem and held lk horizontally before me without alarming 
eitliei of the parties. The fly crawled a little nearer and rested, and a.-ain 
c.uei, the ant standing motionless, but plainly alert and knowing of the dan- 
gei. After several advances, the fly turned its abdomen 
under and forward, thrust out the ovipositor, and strained 
The figute 1 on Plate is too small to show distinctly the position of the 
organs on 11 and 12 , and Mrs. Peart has therefore made a greatly enlarged 
figure of the last segments of Pseudargiolm larva to accompany this note • 
a tnd,cates the opening on 11 with its raised lips; b, the position'of tl.e tubes 
on 12, wholly withdrawn; c, the top of the tube as it appears when sli-htly 
will „“'t 1 4 ’ •"! o'' I’ ro i ected ’ th o tentacles in pencil. The little rings, 
without letter, indicate the spiracles, or breathing holes. 
