Gravenhorst has described 143 species of Tryphon, and the 

 following have been found in this country. 

 T. prgerogator L. T. erylhrocerus Gr. T. lateralis Gr. 

 T. compunctatorZy. T. mesoxanihus Gr. T. melanocerus Gr. 

 T.melancholicus Gr. T. elongator F. T. semicaligatus Gr. 

 T. lucidulus Gr. T. sphaerocephalus Gr. T.insolens Gr. 

 T. aulicus Gr. T. pastoralis Gr. T. evolans Gr. 



T. marginatoriusi^. T. mitigosus Gr. T. fulvilabris Gr. 

 T. tricolor Gr. T. notatus Gr. T. rutilator Gr. 



T. varitarsus Gr. 



Mr.Haliday has discovered two new species, one T. mirifluus 

 (the type of his proposed subgenus Cleniscus) occurs on Wil- 

 lows from July to Sept. ; the other he has named T. Curtisii, 

 and says, " The only specimen I have seen belongs to the same 

 type, as well as T. sexlituratus and about three species besides 

 in my cabinet." 



For the following observations I am indebted to the same 

 gentleman, and am sorry I can only give an abridgement of 

 them. " T. varitarsus I have sent a specimen of, to illustrate 

 Gravenhorst's note on this species : he errs in supposing it 

 the effect of accident ; 3 out of 4 specimens occur thus affected. 

 I subjoin extracts from my notes on the subject, with a sketch 

 of the larvag (for such they are, and not eggs) in different 

 stages. The Tryphons occur in August and Sept. on Wil- 

 lows and Ragwort, and I have found as many as 18 larvae 

 attached to one insect : at first they are all of a smooth pear- 

 shaped and shining opaque waxy tint (fig. B) ; in a kw days 

 they appear as represented at C, which is the underside : at 

 this stage its voracious powers develop themselves, and I find 

 the oldest generally making a meal of his next neighbour, who 

 is soon sucked to the skin. I observed two motions in the 

 mouth, one an opening and shutting of the mandibles, the 

 other a general dilatation and contraction of the membrane of 

 the mouth. Beyond this they show little signs of life while 

 attached to the oviduct, but on being removed, which is easily 

 done without injuring them, the darker ones have a slight 

 jerking motion." 



Neither Mr. Hal id ay nor myself know the male of T. vari- 

 tars7is, but all the females I have seen have had these nits 

 attached to them ; each appears to me to be an animal con- 

 tained in a bladder which has a peduncle at the lower end (B), 

 by which it is attached to the base of the oviduct (A) ; they 

 are there nourished, but whether the animal ever leaves the sac 

 I am not able to determine : I think it probable, since I found 

 that the bladders attached to the upperside of the abdomen of 

 a female Dyticus inarginalis contained an Hydrachna or Lim- 

 nochares, the drawings of which I have by me. 

 The Plant is Spergula nodosa (Knotted Spurrey). 



