US STOCKS-Wall St ends slightly lower on energy, earnings

* Perrigo shares tumble after guidance, CEO replacement

* Tribune Publishing soars over 50 pct after Gannett (Frankfurt: 1G4.F - news) offer

* Indexes end down: Dow 0.15 pct, S&P 0.18 pct Nasdaq (NasdaqGS: NDAQ - news) 0.21 pct (Updates to close)

By Rodrigo Campos

April 25 (Reuters) - Energy shares dragged Wall Street slightly lower on Monday, tracking a decline in oil prices, while earnings and guidance from companies including Perrigo and Xerox (Swiss: XRX.SW - news) also weighed on U.S (Other OTC: UBGXF - news) . stocks.

With (Other OTC: WWTH - news) the S&P 500 up in eight of the past 10 weeks and nearing the record high set almost a year ago, traders are struggling to find reasons to push it even higher as underwhelming earnings and the specter of higher interest rates hover over markets.

Perrigo Co, down 18 percent after it lowered its adjusted profit forecast for the full year, was among the largest drags on the S&P 500. Its Chief Executive and Chairman Joseph Papa resigned to take the reins at Valeant Pharma , whose U.S.-traded shares have tumbled nearly 85 percent from last August.

"This is hardly a big selloff but we are having trouble breaking through (to new highs on the S&P) because of a lack of consistently good earnings and economic data," said Rick Meckler, president of LibertyView Capital Management in Jersey City, New Jersey.

"One of the few positives is a weaker dollar but it is hard to see a reason for that to continue; rates are being lowered around the world and expected to rise here (in the United States), there's no clear path to a lower dollar."

The Federal Reserve is expected to hold interest rates steady after a two-day meeting set to begin on Tuesday, but policymakers may be more upbeat on the economic outlook, leaving the path open for future rate hikes.

The Dow Jones industrial average fell 26.51 points, or 0.15 percent, to 17,977.24, the S&P 500 lost 3.79 points, or 0.18 percent, to 2,087.79 and the Nasdaq Composite dropped 10.44 points, or 0.21 percent, to 4,895.79.

The energy sector was the largest drag on the S&P 500 with a 1.1 percent decline.

First (Other OTC: FSTC - news) -quarter earnings from S&P 500 components are expected to have fallen 7.3 percent from the previous year, according to Thomson Reuters I/B/E/S data. Of the 135 companies that have reported, 59 percent reported revenue above analyst expectations, just short of the average of 60 percent going back to 2002.

Xerox shares tumbled 13.3 percent, their sharpest one-day drop since September 2009, to $9.68 after the printer and copier maker reported lower revenue.

The U.S. Justice Department approved Charter Communications (NasdaqGS: CHTR - news) ' proposed purchase of Time Warner Cable (Xetra: T3W1.DE - news) , whose shares jumped 4.1 percent to $209.63. Charter rose 4.6 percent to $207.01.

Tribune Publishing soared 53 percent to $11.50 after Gannett offered to buy the owner of the Los Angeles Times. Gannett was up 6.5 percent at $16.79.

The PHLX housing index fell 0.7 percent after data showed new U.S. single-family home sales unexpectedly fell in March. The decline was concentrated in the western U.S. region, however, suggesting that the housing market continued to steadily improve.

Declining issues outnumbered advancing ones on the NYSE by a 2.04-to-1 ratio and on the Nasdaq a 1.71-to-1 ratio favored decliners.

The S&P 500 posted 8 new 52-week highs and 1 new low; the Nasdaq recorded 35 new highs and 21 new lows.

Volume on U.S. exchanges was just shy of 6 billion shares traded, below the 6.9 billion daily average over the past 20 days. (Reporting by Rodrigo Campos; Editing by Bernard Orr and Meredith Mazzilli)