110 JOUKNAL OF ENTOMOLOGY AND ZOOLOGY 



3. Some of the dorsal appeudages bearing four teeth on the 



anterior face ; aquatic on Fontinalis antipyretica. 

 (Palearctic) Triogma trisulcata Schumm. 



The dorsal al)dominal appendages with not more than two 

 teeth ; terrestrial on Hypnum. 4 



4. Most of the dorsal appendages bearing two teeth; on 



Hypnum squarrosum. 

 (Palearctic) Liogina glabrata Meig. 



Most of the dorsal appendages bearing a single lateral tooth; 



on Hypmun cupressiforme and a related species. 

 (Nearctic) Liogma nodiconiis 0. S. 



Larva? of the CyUndrofoDihii may be distinguished from those 

 of other crane-flies by the following easily determined points: 

 color green or greenish; the body provided with filiform or 

 leaf-like appendages ; larva> living upon various Bryophytic or 

 Spermatophytic plants. 



A Key to the Known Larvae and Pup^ of the Genus Liogma 

 OsTEN Sacken 



Prothoracic segment bearing four conspicuous dorsal pro- 

 jections about in a line. Meso- and metathoraces with two 

 ])airs of dorsal appendages, each bearing two lateral teeth 

 in front. Second abdominal segment with four dorsal 

 appendages of which the last two bear two teeth in front. 



glahrata Meigen 



Prothoracic segment bearing four inconspicuous dorsal 

 tubercles. Meso- and metathoraces with two pairs of 

 dorsal appendages, the anterior pair small, both jjairs 

 simple. Second abdominal segment with four dorsal 

 api)endages of which the last two bear a single small 

 tooth in front. nodicornis Osten Sacken 



Pronotal breathing horns directed cephalad and dorsad. 

 Mesonotum bearing two pairs of spines, the more anterior 

 being the smaller, situated just behind the breathing- 

 horns, the posterior jiair larger. Metanotum with two 

 pairs of spines. Abdomen with the first tergnte bearing 

 two i)airs of spines of which the first has two lateral 

 branches, the second simple ; the second tergite bears two 



