Mascarenhas stars for Hants
Yorkshire had no answer to the medium-pace swing bowling of Dimitri Mascarenhas as Hampshire took a firm grip on the first day of the Liverpool Victoria County Championship Division One match at the Rose Bowl.
With Mascarenhas taking a season's best six wickets for 65 runs, Yorkshire were shot out for 195 after their captain Craig White had won the toss.
Hampshire responded with far greater certainty to finish the day only 64 behind at 131 for one.
Opening batsman Michael Carberry added to Yorkshire's disappointing day by making an unbeaten 81 in Hampshire's reply.
When Yorkshire batted only Darren Lehmann threatened any kind of form at the crease as wickets tumbled around him.
White was the first to go, bowled driving at Chris Tremlett, and Yorkshire were 20 for two when Anthony McGrath became the first of Mascarenhas' victims thanks to a sharp catch at short leg by John Crawley.
There were useful contributions from Joe Sayers, Michael Lumb and, later, from Gerard Brophy, each of whom made 31.
Australian Lehmann was a class apart, hitting eight fours in his 35-ball innings before Mascarenhas knocked back his off-stump in the second over after lunch.
Lumb battled for 99 balls for his 31, including four fours, before Mascarenhas had him caught behind the wicket by Nic Pothas.
Lehmann's fellow Australian Jason Gillespie held up Hampshire's progress by hitting four fours in his 29 before mistiming a drive off Tremlett and giving Dominic Thornely a catch at mid-off.
Tremlett wrapped up the innings by dismissing last man Deon Kruis to finish with 3-25 and to confirm a return to form after a season of injury problems.
When Hampshire batted the dashing Carberry and Jimmy Adams put on 97 without any problems for the first wicket until Gillespie beat Adams with a ball which swung into him.
In-form Crawley hit leg spinner Mark Lawson for three fours in an over as Hampshire made light of losing Adams.
Carberry had only one close call, when he got an inside edge on 75 to Lawson - but short leg Andrew Gale could not clutch on to the catch as he dived forward.
Hampshire's captain Shane Warne confined himself to only four overs, costing 22 and was content to leave the major share of the bowling action to Tremlett and Mascarenhas.
Mascarenhas bowled 19 overs for his best figures of the summer, also dismissing Brophy and Lawson to record his 13th statistic of five wickets or more in an innings.