no JOURNAL OF ENTOMOLOGY AND ZOOLOGY 



:■,. Some of tlio doi'sal ;ii)i)('n(la,ii('s licarin.o- four tcctli on the 



aiiterioi' face; a.|uatic on Foiil'nmJis iniliinnrlUn. 



( Palearctic) Tiiiuinid In.^nhnlii Sclmram. 



The <loi->al alHlomiiial apiieiida.iies with not more than two 



teeth; terrestrial on llyimuni. 4 



4. ]\I()st of the (loi-sal appendai^es Ijearing- two teeth; on 



Ilypnuni squarrosuiii. 



(Palearetie) Linfiiii,i f/hilnain .Mei- 



Most of the dorsal appendages l>eai-ing a single lateral tooth; 



on Ilypnnin cuprcs.'^iforhir and a related species. 

 (Nearctic) Liogma nodicornis 0. S. 



Larva> of the ('iiHiKlnitninii/i may he distinguished from those 

 of other (■rane4lies hy the following easily determined points: 

 color green or greenish; the hody jirovided with liliform or 

 leaf like appendages; larva' living upon various IJryophytic or 

 Spermatoi)]iytie ])hmts. 



A Key to the Kmown Larv.e and Pup.e of the Genus Liogma 

 OsTEN Sacken 



rothoracic segment bearing four conspicuous dorsal jn'O- 

 jeetions ahout in a line. Meso- and metathoraces with two 

 pairs of dorsal appendages, eacli bearing two lateral teeth 

 in front. Second al)domiual segment with four dorsal 

 ajipendages of which the last two hear two teetli in front. 



(jldlnatd ^Meigen 



i-othoi-acic segment hearing four incouspiruous dorsal 

 tuhei-cles. Meso- and nictat Ihu-aces with two jiaii's of 

 dorsal appendages, the anterior pair small, both jiairs 

 simple. Second abdominal segment with four doi'sal 

 appendages of which the last two bear a .single small 

 tootli in front. iiddicornis Osten Sacken 



•onotal breathing hoiiis directed ceiihalad and dorsad. 

 .Mesonotum ix'aring two pairs of spines, the more anterior 

 being the smaller, situated just heliiud tlie breathing- 

 horns, the posterior pair larger. Metanotum with two 

 pairs of spines. Ahdomiui witli tlie first tergite bearing 

 two iiairs of spiiu's of which the first has two lateral 

 branches, the second simple; the second tergite bears two 



