265 
SegmentLim coslae secundiiin tertio vix longins, — b 
non dilFert nisi pedum anticoiuni femoiibus apice, ti- 
biis tarsisque nigris. — Mas et fcmina^ ob segmenta 
postiema brevia et apicem abdominis binc in utioque 
sexLi obtusuin, segra disceruuntur , nisi animadvertatur 
ad formarn segmenti sex ti di varsam, sub apice abdo- 
minis conspicuam. Attamen margo segmenti sexli in 
feraina pona qiiintum revera prominet, licet adeo bre- 
viter ut difficillime animadvertatur. 
5. D isc omy za. Caput brevissiinum, sen- 
sim versus aperturaiii angustatum, subtriangalare, 
antice couvexiusculnm. Kerteoc suhperpendicula- 
ris, scabriusculus, margine poslico arcuato, acu- 
to, setoso' Epistoma rugoso-scabrosum , apice re- 
tusum margine reflexo, vibrissis seiie disposilis. 
Prcelabriim inclusuni. Abdomen suborbiculari- 
ovatuni, deflexuin, segmentis quatuor magnis, 
quinto aiileriora excedenle. — Seta radiala. 
1. D. mcurva Fall., nigra nitida punctulata, 
epislomale concolore glabro nitido, abdominis 
plani segmento quinto tribus antecedentibus 
aequalibus parnm lungiore, an tennis tarsisque 
posterioribus flavo-testaceis, alis deflexis fusce- 
scentibus, vitta costali et macula in nervö trans- 
verso ordinario fuscis. ? (Long. Ii lin.) 
Mas: segmento abdominis quinto apice 
truncato, sexto inflexo late ovato quintum 
asquante, apertura ani a basi versus apiceni 
segmenti retracta; femma: segmento sexto aii- 
nulari prominulo. 
Fallen Hydromyz. 6. (Psilopa) Metgen Zw. 
Ins. VI, 76, Macquart Su. å Buff. II, 529. 
Hab. in graminosis uliginosis Sueciae me- 
diae et meridionalis raro, in U plandia (Haeff- 
ner) ad Holsniani (Boheman), Westrogothia 
