media subaeqiuilia , qaiiito maris parum longiore, 
sexto iiiilexu subtriaiigulari acuto quiutunj aeqnante. 
— Aiiteniiarum articulus secuuclus seta breviore 
apicLilatus, tertius apice rotuiidatus, suborbicula- 
ris. Seta radiata, radiis basalibus longioribus. 
Epistoma linea tenni impressa ab orbitis disjun- 
ctum. Carina media in parte epistomatis superiore te- 
nnis acutiiiscnia , apice cum protiiberantia transvcrsa 
conflnens. Suprenuim par vibiissariim in protuberantia 
siliim. Pars epistomatis inferior lueiilenter convexo- 
inciirvata Abdomen oblongo-eilipticum I. ovatuoi, apice 
rectnm. Alae ellipticas, abdomine longiores. jXervi ala- 
rum transvcrsi subappropinquati , anterior apici nervi 
aiixiliaris oppositiis, posterior ordinarius a margine in- 
teriore remotior, in medio fere aloe sitiis. 
a) abdomine oblongo. 
1. Vs. cifierella Bohem. 2. Ps. auceH a Susdey, 
3. Ps. oljscLtrella Fat.l. 4. Ps. fusceUa. 
5. Ps. glabricala Fall. (Ps. pallidula i a obs.) 
b) abdomine ovato. 
6. Ps. nii^riua Metg. 7. Ps. lon gula Wahlb. 
Species hujus sectionis, quotquot sibi cognitas habuit 
beat. Fallén, inter NotiphiJas et quiJem cum Hydrelliis 
proxime consociatas recensuit. Ita etiam celeb. Meigen 
omnes hujus coliortis cives, Psilopis insuper propriis ad- 
mixtis, sub Notiphila, deinde vero (in supplem. Zweifl. 
Ins. VII) post Macquartum, sub Hydrellia comprehendit. 
Sed sane Clasiopae non parum ab Hydrelliis divergunt ab- 
dominis forma 1. elongata angustiore 1. ovata subdepressn, 
praecipue autem epistomate superne foveolato-sulcato in 
medio transversim protuberante, antennis brevioribus, ver- 
tice convexo, setis verticis in series transversas postice 
positis, vibrissis rigidis remotis, thoracis antico pubescente 
nec setigero, segmento maris sexto baud appendiculato. E 
contrario epistomate ad typum Psiloparum propriarum for- 
mato, vertice convexo, antennarum articulis basalibus bre- 
vibus, primo fronti fere immerso, secundo setula apiculato, 
ad 
